| 单词 | electric field |
| 例句 | According to Edlefsen’s rudimentary ion detectors, something was going on inside the flask, but whether it was protons accelerating in resonance with an oscillating electric field was by no means clear. Big Science 2015-07-07T00:00:00Z "Some kind of electric field throws you back on the roof." The Hunger Games 2008-09-14T00:00:00Z Theory dictated that if the supposed disintegration were occurring within the nucleus’s electric field, the production of protons and neutrons would diminish as the targets got heavier. Big Science 2015-07-07T00:00:00Z One cruises past me at eye level, its mouth open to reveal cross-hatched rows of teeth, its snout assessing my electric field. Diving with the shark attack survivor who filmed Jaws 2015-06-07T04:00:00Z In 1987, I was studying the effects of electric fields on membranes when I read a paper by Dr. Reba Goodman demonstrating some unusual effects of EMF on living cells. Your cellphone is killing you: What people don’t want you to know about electromagnetic fields 2014-04-12T13:45:00Z Thunderstorm electric fields aren't quite high enough to allow electrical breakdown in air and, as such, a catalyst is required to kick it off. What goes on when lightning strikes? 2013-05-25T23:07:12Z To produce the probes, the researchers focused 800-nanometer laser light into a tube filled with neon gas, where the laser's electric field pulled the electrons away from their atoms and then pushed them back. quantum mechanics: Unlocking the secrets of spin with high-harmonic probes 2023-11-10T05:00:00Z Then she presented the fish with a choice of two doors made of mesh to allow water and electric fields through. Elephantnose Fish ‘Sees’ by Doing an Electric Boogie 2023-11-06T05:00:00Z "Our results show that carefully engineering the vacuum fluctuations of the cavity electric field can lead to drastic changes in a material's magnetic properties." Vacuum in optical cavity can change material's magnetic state without laser excitation 2023-11-03T04:00:00Z Then, an electronic modulator produces electric fields that alter each light beam, shaping them into the individual "teeth" of a frequency comb. New frequency comb can identify molecules in 20-nanosecond snapshots 2023-10-30T04:00:00Z This generated an induced electric field that caused the nitrogen ions to leave the CoN and caused magnetism to appear in the sample, which changed from non-magnetic to magnetic. Wireless device makes magnetism appear in non-magnetic materials 2023-10-30T04:00:00Z "Not a single study that we found in the literature violated the rules we discovered in the electric fish, not even single-celled organisms like amoeba sensing an electric field," Cowan said. To navigate the world, we all shimmy like these electric fish 2023-10-26T04:00:00Z Inside turbulent storm clouds, the collision of tiny ice crystals and graupel—a kind of soft, frozen precipitation—creates an electric field, known as the charging zone, where lightning is born. Mysterious Lightning ‘Superbolts’ Can Be 1,000 Times as Strong as Ordinary Strikes 2023-10-23T04:00:00Z The researchers measured electrons' response to an electric field and a magnetic field, and found that indeed, two ferroic orders, or sets of coordinated behaviors, emerged. From a five-layer graphene sandwich, a rare electronic state emerges 2023-10-18T04:00:00Z Their results clearly show the dependence between the state of progress of the chemical reaction and the intensity of the applied electric field. An electrical switch to control chemical reactions 2023-10-12T04:00:00Z The length of the middle strip and the electric field intensity at the gaps determine the resonance frequency of the device. Sweet Victory: Sensor detects adulteration in honey 2023-10-10T04:00:00Z "For all other magnetoelectric materials, the relationship between the electric field and the magnetic field is linear, and what we needed was a material where that relationship was nonlinear," Robinson said. Magnetoelectric material can reconnect severed nerves 2023-10-10T04:00:00Z When these plates are too close, Efraim says, the electric field can get stronger and stronger, becoming more conductive, and if something similar happens in the clouds, stronger lightning results. Mysterious Lightning ‘Superbolts’ Can Be 1,000 Times as Strong as Ordinary Strikes 2023-10-23T04:00:00Z The team showed they could control both ferroic properties using an electric field. From a five-layer graphene sandwich, a rare electronic state emerges 2023-10-18T04:00:00Z As they flow through the reactor, the reactants interact weakly with the carbon nanotubes, exposing them to the electric field. An electrical switch to control chemical reactions 2023-10-12T04:00:00Z Using carefully placed electric fields generated by deflectors, they controlled the incident energies of the charged particles. Ionic crystal generates molecular ions upon positron irradiation, finds new study 2023-10-10T04:00:00Z In moiré quantum materials, electrons have a range of possible energies -- highs and lows, shaped like an egg carton -- that are determined by the electric field of the materials. Twisted science: New quantum ruler to explore exotic matter 2023-10-05T04:00:00Z Peterson would like to see the new results validated with electric field measurements, along with microphysical measurements from weather radars, to better understand how the behavior of the charged precipitation leads to lightning. Mysterious Lightning ‘Superbolts’ Can Be 1,000 Times as Strong as Ordinary Strikes 2023-10-23T04:00:00Z If a storage device could be made with multiferroic materials, the domains could be switched by a faster, much lower-power electric field. From a five-layer graphene sandwich, a rare electronic state emerges 2023-10-18T04:00:00Z Electrons can be influenced by an external electric field. An electrical switch to control chemical reactions 2023-10-12T04:00:00Z This creates an electric field within the cloud, known as the charging zone. The science of 'superbolts,' the world's strongest lightning strikes 2023-10-06T04:00:00Z The test sample is put within an alternating electric field. Bioengineering breakthrough increases DNA detection sensitivity by 100 times 2023-10-03T04:00:00Z The direction of supercurrent can be controlled either with a magnetic field or a gate electric field. Examining the superconducting diode effect 2023-10-02T04:00:00Z One of the more promising avenues to achieve friction control is with external electric fields that can modulate the properties of lubricants and material surfaces as well as the interactions between them. Researchers dynamically tune friction in graphene 2023-09-28T04:00:00Z The chip houses the ions and traps them using electric fields in the voids between its tiny printed circuits. What’s a Qubit? 3 Ways Scientists Build Quantum Computers 2023-09-28T04:00:00Z Trying to measure gravity’s pull on a charged particle is a lost cause because it’s effectively impossible to nullify ambient electric fields that would skew the results. What Happens if You Drop Antimatter? New Gravitational Test Sees First Fall 2023-09-27T04:00:00Z First, the team used an electric field to catch antiprotons and antielectrons generated in particle collisions. Antimatter falls down, just like ordinary matter 2023-09-27T04:00:00Z Moreover, the electric field effect simulations demonstrate that atomic oxygen sticking to this thin-covered surface undergo minimal changes, thereby sticking moderately. Researchers reveal the origins of zirconium nitride's superior performance 2023-09-21T04:00:00Z Single-stranded DNA is also a bit like cooked spaghetti, but it can be pulled through with an electric field because DNA itself is electrically charged. The missing link to make easy protein sequencing possible? 2023-09-18T04:00:00Z In this new view of Earth’s flow, a wave’s height corresponds to a magnetic field and its speed corresponds to an electric field. Quantum Physics Can Explain Earth’s Weather 2023-08-24T04:00:00Z Much as an electric field can overwhelm the weak force of gravity, so, too, can the warmth of a lonely atom. What Happens if You Drop Antimatter? New Gravitational Test Sees First Fall 2023-09-27T04:00:00Z Sufficiently far away from the source, radio waves exhibit an electric field perpendicular to the direction they’re traveling, meaning the field is tangent to the sphere of waves. Math’s ‘Hairy Ball Theorem’ Has Surprising Implications 2023-08-18T04:00:00Z “The magnitudes of the induced electric field and magnetic field are … well within the detection range of some top-notch sensors,” the study said. Navy carrier strike group deployed near Taiwan 2023-08-16T04:00:00Z They include semiconductors in which conductivity increases with temperature, as well as dielectrics, which are insulators that change their charge properties, or “polarize,” in electric fields. Shape-Shifting, Self-Healing Machines Are Among Us 2023-07-26T04:00:00Z The ticks could be attracted to electric fields because they themselves are accumulating static charge as they creep and crawl through the world. You Really Are a Tick Magnet 2023-06-30T04:00:00Z The plastic dishes, it turns out, generated a small electric field. Watch these worms jump with electricity 2023-06-21T04:00:00Z They measured the electric field generated by the transmitter near the ship, as well as an induced electric field that was detected as it returned from the seafloor substructure. Found: Giant Freshwater Deposits Hiding under the Sea 2023-06-17T04:00:00Z Powerful magnetic and electric fields flowing from and through the tokamak will girdle and heat the plasma cloud so that the atoms inside will collide and fuse together, releasing immense amounts of energy. World’s Largest Fusion Project Is in Big Trouble, New Documents Reveal 2023-06-15T04:00:00Z Davis has been working on a smaller, portable type of test, an ion mobility spectrometer, which identifies substances based on the mobility of their molecules in an electric field. Astronomy Tool Can Now Detect COVID in Breath 2023-05-12T04:00:00Z This voltage is similar to or even lower than that of a typical mammal’s electric field. You Really Are a Tick Magnet 2023-06-30T04:00:00Z So, to further probe the behavior, the researchers introduced an experimental electric field on an otherwise uncharged glass dish and watched the worms with high-speed video cameras. Watch these worms jump with electricity 2023-06-21T04:00:00Z It is easier to describe light as rotating complex electric and magnetic fields than as oscillating real ones, despite the fact that there is no such thing as an imaginary electric field. Quantum Physics Falls Apart without Imaginary Numbers 2023-04-24T04:00:00Z Notably, the electric field was low for all of these experiments, around 200 millivolts per millimeter. Electricity beats time when it comes to healing wounds, research finds 2023-04-19T04:00:00Z Theorists think that dark energy could represent some new sort of field in space, a bit like an electric field, or it could be a fundamental property of empty space itself. Dark energy from supermassive black holes? Physicists spar over radical idea 2023-02-26T05:00:00Z One method encodes information in the spin of individual electrons trapped by electric fields inside conventional semiconductors such as silicon. Underdog Technologies Gain Ground in Quantum-Computing Race 2023-02-13T05:00:00Z The researchers introduced a similar electric field to bumble bees by rubbing the bees with pollen and watched C. elegans make the same jumps. Watch these worms jump with electricity 2023-06-21T04:00:00Z Consisting of a pointed metal rod attached to a building’s roof and connected to the ground by a wire, the rod creates a strong electric field that draws lightning away from the building. Playing Zeus, scientists use a laser beam to control lightning bolts 2023-01-16T05:00:00Z It turns out that scientists got the idea because skin cells are electrotactic, meaning they move in the direction of an electric field. Electricity beats time when it comes to healing wounds, research finds 2023-04-19T04:00:00Z The AeroCollect, as it’s called, has a chip that uses an electric field to suck in and trap air in microscopic chambers. Armed with air samplers, rope tricks, and—yes—ants, virus hunters spot threats in new ways 2023-01-05T05:00:00Z The chemistry of these microdroplet interfaces is dominated by large electric fields, partial solvation where molecules are partially surrounded by water, highly reactive molecules and very high acidity. The water paradox: How did the first life form in a hostile liquid? 2022-11-15T05:00:00Z Many far-flying insects generate electric fields when they flap their wings. Watch these worms jump with electricity 2023-06-21T04:00:00Z Spiders spin negatively charged webs that reach out to trap positively charged insects, and they use the electric fields of trees to float through the air. There’s Lightning Brewing in Every Swarm of Insects 2022-10-26T04:00:00Z In other words, if skin cells are floating around randomly in a petri dish, and an electric field appears in the dish, the cells begin moving in the same direction. Electricity beats time when it comes to healing wounds, research finds 2023-04-19T04:00:00Z "We only recently discovered that biology and static electric fields are intimately linked," the study's lead author, Ellard Hunting, a biologist at the University of Bristol, said in a statement. Insect swarms create so much electricity that they may influence weather, study finds 2022-10-26T04:00:00Z A strong electric field will push the electrons sideways until they hit three closely spaced planes of parallel wires, each plane oriented in a different direction. Showdown: Two huge neutrino detectors will vie to probe matter’s origins 2022-09-28T04:00:00Z When excess charge is placed on a conductor or the conductor is put into a static electric field, charges in the conductor quickly respond to reach a steady state called electrostatic equilibrium. College Physics for AP Courses 2015-08-12T00:00:00Z Scientists measure the strength of the electric field in the atmosphere by calculating the difference between the charge at Earth’s surface and in the air above the ground. There’s Lightning Brewing in Every Swarm of Insects 2022-10-26T04:00:00Z Roughly speaking, an electric field works on the cells similarly to how a shepherd dog works to control the motion of a once-randomly-moving group of sheep. Electricity beats time when it comes to healing wounds, research finds 2023-04-19T04:00:00Z These devices use magnetic and electric fields to increase the speeds of nuclear particles. Chemistry 2019-02-14T00:00:00Z The gel is placed in a solution that maintains a constant pH, and an electric field is applied over the length of the gel. Biology for AP Courses 2022-06-09T00:00:00Z A conductor placed in an electric field will be polarized. College Physics for AP Courses 2015-08-12T00:00:00Z They looked at how this charge affected the behavior of insects in part by watching the university’s honeybees fly around, then measuring the electric fields produced by plants they visited. There’s Lightning Brewing in Every Swarm of Insects 2022-10-26T04:00:00Z Using this terminology, we can say that stationary electric charges produce electric fields, and moving electric charges also produce magnetic fields. Astronomy 2016-10-13T00:00:00Z Reset all, and then with a large partial negative charge on A, turn on the electric field and describe what happens. Chemistry 2019-02-14T00:00:00Z And because the presence of water in clouds sets up the intense electric fields that lead to lightning, dirty air leads to more lightning. When It Comes to Lightning, Don’t Pass the Salt 2022-08-12T04:00:00Z Figure 18.19 This illustration shows a spherical conductor in static equilibrium with an originally uniform electric field. College Physics for AP Courses 2015-08-12T00:00:00Z He reached out to Giles Harrison, a meteorologist at the University of Reading in England, and, together, they measured how the density of honeybee swarms changed the electric field in the atmosphere. There’s Lightning Brewing in Every Swarm of Insects 2022-10-26T04:00:00Z Notice that the curl of the electric field does not change over time, although the magnetic field does change over time. Calculus, Volume 3 2016-03-30T00:00:00Z Gamma rays, which are unaffected by the electric field, must be uncharged. Chemistry 2019-02-14T00:00:00Z That makes sense based on how electric fields build up within clouds, the team proposes. When It Comes to Lightning, Don’t Pass the Salt 2022-08-12T04:00:00Z Free charges move within the conductor, polarizing it, until the electric field lines are perpendicular to the surface. College Physics for AP Courses 2015-08-12T00:00:00Z For example, a photon can be polarized so that the electric field in it wriggles vertically, horizontally, or both ways at the same time—at least until it’s measured. Reality doesn’t exist until you measure it, quantum parlor trick confirms 2022-07-20T04:00:00Z Gravitational fields and electric fields associated with a static charge are examples of gradient fields. Calculus, Volume 3 2016-03-30T00:00:00Z As Maxwell showed, electromagnetic waves consist of an electric field oscillating in step with a perpendicular magnetic field, both of which are perpendicular to the direction of travel. Chemistry 2019-02-14T00:00:00Z So they created one out of silicon carbide, which supports the robots’ structure; electrodes made of copper and gold, which carry current; and piezoelectric ceramics, which change shape in response to an electric field. New 3-D printing technique can make autonomous robots in a single step 2022-07-08T04:00:00Z How can a very uniform electric field be created? College Physics for AP Courses 2015-08-12T00:00:00Z Also, electrons liberated by the speeding nucleus are tugged by an electric field toward the top of the tank, producing a second flash. Dark matter hunt heats up with first result from world’s biggest detector 2022-07-06T04:00:00Z We use Stokes’ theorem to derive Faraday’s law, an important result involving electric fields. Calculus, Volume 3 2016-03-30T00:00:00Z These droplets initially fell due to gravity, but their downward progress could be slowed or even reversed by an electric field lower in the apparatus. Chemistry 2019-02-14T00:00:00Z Once it’s in position, doctors could “hit it with an electric field” to get it to release its payload. New 3-D printing technique can make autonomous robots in a single step 2022-07-08T04:00:00Z The properties of conductors in electrostatic equilibrium indicate that the electric field between the plates will be uniform in strength and direction. College Physics for AP Courses 2015-08-12T00:00:00Z From bat sonar to dog noses to piscine electric fields, Yong’s reporting is layered, seasoned with vivid scenes from laboratories and in the field, interviews with researchers across a spectrum of disciplines. Ed Yong’s ‘An Immense World’ expands our understanding of the web of life 2022-07-06T04:00:00Z A consequence of Faraday’s law is that the curl of the electric field corresponding to a constant magnetic field is always zero. Calculus, Volume 3 2016-03-30T00:00:00Z With a small partial negative charge on A, turn on the electric field and describe what happens. Chemistry 2019-02-14T00:00:00Z It uses magnets to create an electromagnetic field of about 6ft that interferes with the electric field senses that a shark uses to hunt and navigate. The innovative surfing tech making waves 2022-03-13T05:00:00Z The ionosphere is responsible for a range of phenomena including the electric field surrounding Earth. College Physics for AP Courses 2015-08-12T00:00:00Z As physicist Wolfgang Pauli would explain in 1927, spin is quite unlike other physical concepts such as velocities or electric fields. It Has Been 100 Years Since a Quantum Experiment Showed Why We Don’ Fall Through Our Chairs 2022-02-08T05:00:00Z Typically, the photons’ own magnetic and electric fields oscillate perpendicularly to their path, but in random directions. NASA telescope to study how extreme cosmic objects sculpt x-ray light 2021-12-02T05:00:00Z Schmidt-Kaler is an expert on a type of ion trap in which electric fields are used to confine a single calcium ion. This Simple Experiment Could Challenge Standard Quantum Theory 2021-10-21T04:00:00Z The team then used an electric field to tune the density of the electrons that moved freely along the interface between the two layers. This Is What a Solid Made of Electrons Looks Like 2021-10-07T04:00:00Z The electric field is very strong at the point and can exert a force large enough to transfer charge on or off the conductor. College Physics for AP Courses 2015-08-12T00:00:00Z This presents a problem, because electric fields can produce heat in biological tissues and pose a danger to humans. This Room Could Wirelessly Charge All Your Devices 2021-09-02T04:00:00Z However, if the oscillating electric field in the microwaves grows too strong, it will set off damaging sparks. This is the first mini particle accelerator to power a laser 2021-07-25T04:00:00Z Irregularities across the anode’s surface cause the electric field to intensify at certain spots, which causes zinc to deposit there, further enhancing the electric field. Zinc-based cells promise to be cheaper and safer for grid storage 2021-05-27T04:00:00Z It used a much larger 14-meter-diameter storage ring and ran at a certain “magic” energy where the electric field would not affect the muon spin. The Fermilab Muon Measurement Might or Might Not Point to New Physics, But... 2021-05-02T04:00:00Z It is also assumed that q is so small that it does not alter the charge distribution creating the electric field. College Physics for AP Courses 2015-08-12T00:00:00Z Light is polarized when its electric field ‘wiggles’ in a particular direction, rather than in a random one. Hints of Twisted Light Offer Clues to Dark Energy’s Nature 2021-02-02T05:00:00Z To accelerate particles in shorter distances, physicists need stronger electric fields. This is the first mini particle accelerator to power a laser 2021-07-25T04:00:00Z Light’s polarization is a property that describes how its electric field moves. The Timeless Journey of the Möbius Strip 2021-01-16T05:00:00Z An E-field Pod detects the electric field that surrounds a static charge. In a year of loss, I found comfort in an unlikely place: paranormal TV 2020-12-10T05:00:00Z Like all vectors, the electric field can be represented by an arrow that has length proportional to its magnitude and that points in the correct direction. College Physics for AP Courses 2015-08-12T00:00:00Z Applying an electric field transformed the stack from a conductor to an insulator and then, suddenly, into a superconductor: a material that frictionlessly conducts electricity. Twisted graphene could power a new generation of superconducting electronics 2020-11-19T05:00:00Z The light rips electrons from the atoms, creating a tsunami of ionization that moves through the gas, followed by a wake of rippling electrons that produces an extremely strong electric field. This is the first mini particle accelerator to power a laser 2021-07-25T04:00:00Z By contrast, an emergent electric field arises from the dynamics of non-collinear spin structures. Inductors enter the world of quantum mechanics 2020-10-06T04:00:00Z The atmosphere is a great insulator, but when the strength of the electric field overwhelms the insulating capacity of the atmosphere, intra-cloud lightning occurs. How a Pacific storm fueled lightning that sparked California's biggest-ever fire season 2020-09-09T04:00:00Z Figure 18.30 shows two pictorial representations of the same electric field created by a positive point charge Q . College Physics for AP Courses 2015-08-12T00:00:00Z That collective behavior enables a modest number of electrons, shepherded to the right place by an electric field, to radically change the material’s behavior, from insulator to conductor to superconductor. Twisted graphene could power a new generation of superconducting electronics 2020-11-19T05:00:00Z Last year Litvinyuk and his colleagues published results showing that when electrons in hydrogen atoms are confined by an external electric field that acts like a barrier, they occasionally tunnel through it. Quantum Tunneling Is Not Instantaneous, Physicists Show 2020-07-22T04:00:00Z Ms. Cole and Degen took their readers back in time to the era of dinosaurs, into a hurricane, into the electric field and into a beehive. Joanna Cole, ‘Magic School Bus’ writer who hooked children on science, dies at 75 2020-07-16T04:00:00Z They tweaked the conditions by varying the magnetic field and adding an electric field. Welcome anyons! Physicists find best evidence yet for long-sought 2D structures 2020-07-02T04:00:00Z The closeness of the lines is directly related to the strength of the electric field. College Physics for AP Courses 2015-08-12T00:00:00Z I got my Ph.D. in biomedical engineering, electric fields of the brain. Is Brain Stimulation the Key to Athletic Performance? 2020-06-28T04:00:00Z The team researches “electroceutical” materials that wirelessly “generate electric fields across the surface of the fabric,” Sen says. Electrified Fabric Could Zap the Coronavirus on Masks and Clothing 2020-06-24T04:00:00Z There is also a criterion known as the electric field mill rule that places a limit on the strength of the electric field in the atmosphere. The Air Force weather team that keeps canceling your rocket launches 2020-05-30T04:00:00Z The weather violations included natural lightning and the strength of the electric field in the atmosphere. SpaceX, NASA astronauts make preparations for second attempt at historic launch 2020-05-29T04:00:00Z Note that the electric field is defined for a positive test charge q , so that the field lines point away from a positive charge and toward a negative charge. College Physics for AP Courses 2015-08-12T00:00:00Z For measurements of the atmosphere’s natural electric field, the team used data gathered at a site near London, where such data were easier to obtain. Can nuclear fallout make it rain? 2020-05-13T04:00:00Z The silver and zinc then generate a weak electric field that zaps pathogens on the surface. Electrified Fabric Could Zap the Coronavirus on Masks and Clothing 2020-06-24T04:00:00Z The basic idea is to trap a single ion in a Penning trap, a device that confines charged particles using magnetic and electric fields. Mass spectrometry for future atomic clocks 2020-05-05T04:00:00Z In a paper in Nature, Noël et al.1 report an approach that allows low-power spin control using an electric field. Electric control of a spin current has potential for low-power computing 2020-04-21T04:00:00Z The total electric field created by multiple charges is the vector sum of the individual fields created by each charge. College Physics for AP Courses 2015-08-12T00:00:00Z All it takes is applying an electric field of the right frequency with a simple electrode, the researchers report. Chance discovery brings quantum computing using standard microchips a step closer 2020-03-11T04:00:00Z Powerful magnetic and electric fields whip charged particles around, in a computer simulation of a spinning neutron star.Credit: Daily briefing: Climate change made Australian fires at least 30% more likely 2020-03-04T05:00:00Z When it appears in a strong electric field in the atmosphere, it's also commonly accompanied by a "cracking or hissing noise." Rare weather phenomenon 'St. Elmo's Fire' captured by hurricane hunter aircraft in North Atlantic 2020-02-19T05:00:00Z However, a peculiarity of the effect observed by Noël and colleagues is that it occurs only when the applied electric field exceeds a critical value. Electric control of a spin current has potential for low-power computing 2020-04-21T04:00:00Z The following example shows how to add electric field vectors. College Physics for AP Courses 2015-08-12T00:00:00Z But the wire melted and broke, turning the current-carrying wire into a charge-collecting electrode that instead generated an oscillating electric field. Chance discovery brings quantum computing using standard microchips a step closer 2020-03-11T04:00:00Z Poled ferroelectrics show a large electromechanical response to an external electric field or to mechanical force, and this response is typically characterized by a quantity dubbed the piezoelectric co--efficient. Transparent crystals with ultrahigh piezoelectricity 2020-01-14T05:00:00Z The Casimir force results when quantum fluctuations induce fluctuating charge densities in these atoms; the charge densities then interact through their electric fields. Heat transferred in a previously unknown way 2019-12-10T05:00:00Z This raises concerns: true ferroelectric materials don’t show polarization only at high fields; it is an intrinsic state that occurs even in the absence of an external electric field. Electric control of a spin current has potential for low-power computing 2020-04-21T04:00:00Z Figure 18.33 shows how the electric field from two point charges can be drawn by finding the total field at representative points and drawing electric field lines consistent with those points. College Physics for AP Courses 2015-08-12T00:00:00Z Electrons passing through a sample of a conducting material are driven by an electric field. Electrons in graphene go with the flow 2019-12-03T05:00:00Z They applied an electric field to the electrons until the voltage associated with this field was large enough to stop the electrons. One tick closer to a nuclear clock 2019-09-10T04:00:00Z The authors attribute their unexpected room-temperature polymerization to the large, highly localized electric field generated when a voltage is applied between the STM tip and the surface. Two-dimensional polymer knits together and unravels in an electric field 2019-08-18T04:00:00Z A strong electric field would push these electrons to the grid. Resurrected detector will hunt for some of the strangest particles in the universe 2019-08-08T04:00:00Z The direction of the electric field is tangent to the field line at any point in space. College Physics for AP Courses 2015-08-12T00:00:00Z Such an arrangement provides the required sensitivity for detecting weak electric fields or voltage gradients, such as those associated with the Hall voltage. Electrons in graphene go with the flow 2019-12-03T05:00:00Z An electric field then accelerates them and routes them out the back of the spacecraft. The Good Kind of Crazy: The Quest for Exotic Propulsion 2019-07-29T04:00:00Z The authors propose that the reactions are driven by the strong, localized electric field generated between the tip and the graphite. Two-dimensional polymer knits together and unravels in an electric field 2019-08-18T04:00:00Z By manipulating the electric field on their gates, the researchers were able to control exactly how many electrons were present in each repeated moiré cell. Trilayer graphene shows signs of superconductivity 2019-07-17T04:00:00Z To do this, make a list of five properties for the Coulomb force field analogous to the five properties listed for electric field lines. College Physics for AP Courses 2015-08-12T00:00:00Z An electric field is generated at the junction between these two regions. Sunlight harvested by nanotubes 2019-06-18T04:00:00Z The neutron beam corrals the photons by refracting them, or bending their path, and the laser beam’s electric field “traps” the neutrons. The Good Kind of Crazy: The Quest for Exotic Propulsion 2019-07-29T04:00:00Z The authors accredit their astonishing finding to the influence of the strong, oriented electric field beneath the STM tip. Two-dimensional polymer knits together and unravels in an electric field 2019-08-18T04:00:00Z During the flash, charge deposited along a leader produces a large radial electric field that pushes charge away from the leader. A closer look at lightning reveals needle-like structures 2019-04-16T04:00:00Z Compare each item in your list of Coulomb force field properties with those of the electric field—are they the same or different? College Physics for AP Courses 2015-08-12T00:00:00Z An electric field is generated across the junction between these two regions. Sunlight harvested by nanotubes 2019-06-18T04:00:00Z Writing in Nature, Benea-Chelmus et al.2 provide an answer to this question by finding evidence for correlations between fluctuations in the electric field of a vacuum. Correlations detected in a quantum vacuum 2019-04-09T04:00:00Z This would require comparably strong electric fields to be produced at least on the micrometre scale — which seems feasible, but challenging. Two-dimensional polymer knits together and unravels in an electric field 2019-08-18T04:00:00Z This discharge forms a conical structure called a corona sheath that expands outwards until the radial electric field becomes smaller than a particular threshold. A closer look at lightning reveals needle-like structures 2019-04-16T04:00:00Z Include on this diagram the charge distribution and the corresponding electric field. College Physics for AP Courses 2015-08-12T00:00:00Z The established carmakers are plotting to dominate the luxury electric field, taking market share away from Tesla. Tesla Got an Early Lead, but Luxury Electric Rivals Are Racing to Catch Up 2019-04-04T04:00:00Z Li and colleagues propose combining external pressure and electric fields as a way of avoiding the hysteresis problems associated with plastic crystals. Refrigeration based on plastic crystals 2019-03-26T04:00:00Z "This greatly increases the atom's sensitivity to electric fields. We've made a giant compass needle that is much more sensitive than conventional ones," says Dr Paul Kunz, part of the research team. Soon we'll be able to see round corners and underground 2019-03-07T05:00:00Z It is easy to add a photon to an empty site, without dissipation, by applying a microwave-frequency electric field. A traffic jam of light 2019-02-05T05:00:00Z Is there any electric field outside the cell? College Physics for AP Courses 2015-08-12T00:00:00Z But in this study, Parfrey and his collaborators included individual particles in their simulations and watched how their motions entwined with, and contributed to powering, the magnetic and electric fields. Black-hole jets begin to reveal their antimatter secrets 2019-01-29T05:00:00Z However, the fact that most molecules in plastic crystals are polar does not guarantee that applying electric fields to these materials will eliminate the effects of hysteresis. Refrigeration based on plastic crystals 2019-03-26T04:00:00Z That twist radically changed the bilayer’s properties — turning it first into an insulator and then, with the application of a stronger electric field, into a superconductor. How ‘magic angle’ graphene is stirring up physics 2019-01-01T05:00:00Z Liquid crystals offer great potential because of their large response to weak external electric fields and other perturbations. Elusive torque sensed by liquid crystals 2018-12-18T05:00:00Z Sketch the electric field lines in the vicinity of two opposite charges, where the negative charge is three times greater in magnitude than the positive. College Physics for AP Courses 2015-08-12T00:00:00Z Parker aims to solve the puzzle by passing through the outer atmosphere and directly sampling its particle, magnetic and electric fields. Sun-skimming probe starts calling home 2018-12-12T05:00:00Z When charged molecules in the air are subjected to an electric field, they are accelerated. Flying with ionic wind 2018-11-20T05:00:00Z With neither propellers nor jets, the airplane gets its thrust by applying a strong electric field to the air. Experimental plane flies silently, may lead to quiet drones 2018-11-21T05:00:00Z Unlike most propulsion systems for vessels in space, which produce thrust through chemical reactions, the electric fields of ion engines accelerate xenon atoms. NASA’s Dawn Mission to the Asteroid Belt Says Good Night 2018-11-01T04:00:00Z A simple and common technique for accelerating electrons is shown in Figure 18.55, where there is a uniform electric field between two plates. College Physics for AP Courses 2015-08-12T00:00:00Z NV centers thus promise to provide exquisitely sensitive probes for measuring things like electric fields, magnetic fields and temperatures, with great accuracy and at precisely defined positions. The Second Quantum Revolution 2018-10-18T04:00:00Z Soon, schools of fish began gathering in the electric fields emitted by the buoys’ computers, which drew fishermen, some of whom scrapped the equipment for copper wiring. Why the Tsunami in Indonesia Struck Without Warning 2018-10-04T04:00:00Z For the MIT airplane, that involves a series of thin wires at the front of the plane that generate a powerful electric field. Experimental plane flies silently, may lead to quiet drones 2018-11-21T05:00:00Z In this region of the phase diagram, the direction of the material’s polarization rotates with varying composition, applied electric fields or stresses. Ferroelectric polymers morph into action 2018-10-02T04:00:00Z Figure 18.55 Parallel conducting plates with opposite charges on them create a relatively uniform electric field used to accelerate electrons to the right. College Physics for AP Courses 2015-08-12T00:00:00Z Leuthardt finds the idea of manipulating biology with electric fields rather than molecules exciting. The innovative therapies that could break the brain-cancer stalemate 2018-09-25T04:00:00Z Innovative therapies that use lasers or electric fields offer further rays of hope. Brain cancer 2018-09-25T04:00:00Z This electron motion generates a spatial modulation in the electric-charge density of the plasma, which in turn produces an electric field known as a wakefield. Short proton bunches rapidly accelerate energetic electrons 2018-09-18T04:00:00Z These electrons are then accelerated by the electric field of a second light pulse — known as the streaking field — and the final energy of the electrons is measured. Timing the action of light on matter 2018-09-18T04:00:00Z Your instructor may wish for you to consider the electric field off axis or for a more complex array of charges, such as those in a water molecule. College Physics for AP Courses 2015-08-12T00:00:00Z A patient wears the Optune device, which delivers low-voltage electric fields to the brain.Credit: The innovative therapies that could break the brain-cancer stalemate 2018-09-25T04:00:00Z Physicists assume that space contains a Higgs field—a bit like an electric field—generated by Higgs bosons lurking in the vacuum. Physicists’ search for rare Higgs boson pairs could yield new physics 2018-09-13T04:00:00Z Colliding pellets transfer electric charge, creating an electric field. Where will lightning strike next? A new model could help pilots avoid dangerous storms 2018-09-05T04:00:00Z Most electron accelerators use powerful radio-frequency waves to carry electric fields that push a beam of injected electrons, which gain more and more energy as they move inside a high-vacuum pipe. CERN’s pioneering mini-accelerator passes first test 2018-08-28T04:00:00Z We therefore look at a uniform electric field as an interesting special case. College Physics for AP Courses 2015-08-12T00:00:00Z Time things just right and the passing particles surf the radio waves’ electric fields to gain energy. Much cheaper, smaller atom smashers may be on the horizon 2018-08-29T04:00:00Z An electric field vanishes if there's no charge around, but the Higgs field must always linger in the vacuum—or else it wouldn't be able to impart mass to other particles. Physicists’ search for rare Higgs boson pairs could yield new physics 2018-09-13T04:00:00Z In ferroelectric materials, however, clusters of ions assemble in a way that results in electric dipoles and a macroscopic polarization, even in the absence of an electric field. Electric and magnetic domains inverted by a magnetic field 2018-08-21T04:00:00Z Stronger electric fields accelerate particles over shorter distances, so doubling the field strength means reaching the same energies with an accelerator half as long. CERN’s pioneering mini-accelerator passes first test 2018-08-28T04:00:00Z The sparks are perpendicular to the plates, following electric field lines between them. College Physics for AP Courses 2015-08-12T00:00:00Z Parker aims to solve these puzzles by directly sampling the corona's particle, magnetic and electric fields. Daring mission to unlock Sun's mysteries 2018-08-10T04:00:00Z Electric charges that accumulate on the surfaces of these materials produce an internal electric field called a depolarization field that, if not mitigated by external electrodes, is often large enough to suppress the polarization completely. Stable and switchable electric polarization in two dimensions 2018-07-29T04:00:00Z Back at the lab, she introduced the insects, one by one, to a clear polycarbonate box in a room that doubled as a Faraday cage, meaning it was isolated from the atmospheric electric field. Research sheds light on mystery of how spiders 'take flight' 2018-07-05T04:00:00Z One is laser-driven, where a laser’s oscillating electric field pushes the plasma’s electrons sideways, whereas heavier, positive ions respond more slowly and essentially stay in place. CERN’s pioneering mini-accelerator passes first test 2018-08-28T04:00:00Z To find the total electric field, you must add the individual fields as vectors, taking magnitude and direction into account. College Physics for AP Courses 2015-08-12T00:00:00Z Hayabusa2 is powered by ion engines, which accelerate charged atoms of xenon with an electric field to generate thrust. Japan’s Hayabusa2 Spacecraft Creeps Up on the Ryugu Asteroid 2018-06-25T04:00:00Z Such charges produce an electric field known as a depolarization field that usually suppresses the polarization, limiting applications for these materials. Stable and switchable electric polarization in two dimensions 2018-07-29T04:00:00Z Together, the findings, reported in Current Biology, suggest that while air currents are surely important for ballooning, spiders may exploit electric fields too. Research sheds light on mystery of how spiders 'take flight' 2018-07-05T04:00:00Z The resulting separation of positive and negative charges greatly amplifies the laser’s electric field. CERN’s pioneering mini-accelerator passes first test 2018-08-28T04:00:00Z While we use blue arrows to represent the magnitude and direction of the electric field, we use green lines to represent places where the electric potential is constant. College Physics for AP Courses 2015-08-12T00:00:00Z The circuit board prompts the electrodes to emit an electric field; when a person’s body intercepts this field, it triggers a measurable change in current at the nearby electrodes. How to Convert Your Wall into a Giant Touch Screen 2018-06-01T04:00:00Z They also detected switching of this polarization at room temperature when an electric field was applied. Stable and switchable electric polarization in two dimensions 2018-07-29T04:00:00Z The electric field of CO tips and its relevance for atomic force microscopy. The effect of hydration number on the interfacial transport of sodium ions 2018-05-13T04:00:00Z The document describes, among other things, the hazards posed by a ”high intensity electric field radiated inside the cockpit” from nearby lightning. Lightning Hazards Prompt Boeing to Fix 787 Jets 2018-04-25T04:00:00Z Since the electric field lines point radially away from the charge, they are perpendicular to the equipotential lines. College Physics for AP Courses 2015-08-12T00:00:00Z When a wave of light of a particular colour — or, equivalently, frequency — hits the film, the oscillating electric field that is associated with the light wiggles the charged particles in the material. Mirrors made of a single atomic layer 2018-04-08T04:00:00Z "It's a pulse of the electric field that travels up. For the sprite - when the atmosphere gets thin, the field can get a discharge." Hunting mystery lightning from space 2018-04-06T04:00:00Z A team led by Erik Streed at Griffith University in Brisbane, Australia, trapped a glowing ytterbium ion with an electric field, then displaced the ion with another electric field. A sensor too small to see sizes up force fields 2018-03-22T04:00:00Z Alternating electric fields accelerate the protons in larger and larger circles. How proton therapy disrupts cancer Equipotential lines are perpendicular to electric field lines in every case. College Physics for AP Courses 2015-08-12T00:00:00Z The material’s response to an oscillating electric field is, in general, not uniform with respect to incident waves from across the electromagnetic spectrum. Mirrors made of a single atomic layer 2018-04-08T04:00:00Z Next, the researchers applied a small electric field to feed just a few extra charge carriers into the system, and it became a superconductor1. Surprise graphene discovery could unlock secrets of superconductivity 2018-03-04T05:00:00Z This contraption is an ion trap that, using electric fields, allows physicists to suspend single atoms for quantum-computing research. Boosters, bacteria and human-sized drones — February’s top science images 2018-03-01T05:00:00Z Alternating electric fields accelerate the protons in larger and larger circles. How proton therapy disrupts cancer It is important to note that equipotential lines are always perpendicular to electric field lines. College Physics for AP Courses 2015-08-12T00:00:00Z The EEG of a conscious brain shows no striking features, just low-amplitude and seemingly uncorrelated ups and downs in the frequency of oscillations in the brain’s electric field. Making anaesthesia safer by tracking brain activity 2018-02-22T05:00:00Z The atom’s place is being held by an electric field created by two metal electrodes. Image of a single suspended atom nabs science photography prize 2018-02-15T05:00:00Z The atom is held nearly motionless by an electric field emanating from two metal electrodes placed on either side of it. How a Student Took a Photo of a Single Atom 2018-02-14T05:00:00Z Alternating electric fields accelerate the protons in larger and larger circles. How proton therapy disrupts cancer Note that in the above equation, E and F symbolize the magnitudes of the electric field strength and force, respectively. College Physics for AP Courses 2015-08-12T00:00:00Z Like any electromagnetic wave, a laser beam contains an electric field that whips back and forth. Physicists are planning to build lasers so powerful they could rip apart empty space 2018-01-24T05:00:00Z When placed in an electric field, this deformed electron would experience a force called a torque that would cause it to rotate. Fundamental physics is frustrating physicists 2018-01-11T05:00:00Z This means an electric field builds up in the air between the ground and the cloud. A Star Wars lightsaber might be possible — but keep it away from lightning 2017-12-29T05:00:00Z Inside, a ring of alternating electric fields accelerate protons. How proton therapy disrupts cancer Given the electric field lines, the equipotential lines can be drawn simply by making them perpendicular to the electric field lines. College Physics for AP Courses 2015-08-12T00:00:00Z As the beam's intensity rises, so, too, does the strength of its electric field. Physicists are planning to build lasers so powerful they could rip apart empty space 2018-01-24T05:00:00Z Some scientists think that ionized methane accumulating in the atmosphere at night makes the electric field stronger over the site. Welcome to the World's Most Awesomely Awful Places 2017-12-04T05:00:00Z The molecules are then sorted according to how fast they move through an oscillating electric field. A breathalyser for disease 2017-11-30T05:00:00Z One alternative, called bulk electroporation, exposes cells to an electric field that pokes holes in their membranes to let in genetic material and proteins. Chip Reprograms Cells to Regenerate Damaged Tissue 2017-09-29T04:00:00Z The equipotential lines can be drawn by making them perpendicular to the electric field lines, if those are known. College Physics for AP Courses 2015-08-12T00:00:00Z If it is delivered as a naked molecule, by zapping the cell with an electric field that temporarily opens the cell membrane, then it doesn't last long. Gene therapy: Erasing sickle-cell disease : Nature : Nature Research 2017-09-26T04:00:00Z The experimental procedure involves producing and trapping antihydrogen atoms, removing any residual charged particles from the trap using pulsed electric fields, and then introducing microwaves into the trapping volume. Observation of the hyperfine spectrum of antihydrogen : Nature : Nature Research 2017-08-01T04:00:00Z In these experiments, an electric field traps the proton while a magnetic field forces it to move in a circle. Surprise! The proton is lighter than we thought 2017-07-20T04:00:00Z Tissue nanotransfection, described in a study published in August in Nature Nanotechnology, involves a chip containing an array of tiny channels that apply electric fields to individual cells. Chip Reprograms Cells to Regenerate Damaged Tissue 2017-09-29T04:00:00Z An important application of electric fields and equipotential lines involves the heart. College Physics for AP Courses 2015-08-12T00:00:00Z Thus the quantum behaviour of the electric field is confirmed without manipulating the field, or photons, directly. Witness gravity’s quantum side in the lab 2017-07-10T04:00:00Z Electrodes lining the chamber create an electric field that pushes against the onrushing electrons and opposes their motion. Weighing the universe's most elusive particle 2017-06-29T04:00:00Z The MIT team also found no markers indicating that the electric fields caused abnormal inflammation, DNA damage, or cell death in the targeted tissue. Electric fields tease buried brain cells into action 2017-06-01T04:00:00Z To generate thrust, it is spread across a grid and an electric field is applied. Energy: Powering change : Nature : Nature Research 2017-05-16T04:00:00Z More about the relationship between electric fields and the heart is discussed in Energy Stored in Capacitors. College Physics for AP Courses 2015-08-12T00:00:00Z That separation of positive and negative charges in the meteor’s wake produces a large electric field that drives an electrical current. New theory may explain the ‘music of the meteors’ 2017-04-14T04:00:00Z Only those electrons that have enough energy can push past the electric field and reach the detector at the far end of the chamber. Weighing the universe's most elusive particle 2017-06-29T04:00:00Z The scientists named the new technique “TI” for “temporally interfering” electric fields. Electric fields tease buried brain cells into action 2017-06-01T04:00:00Z Dr. Dehmelt devised a configuration of magnetic and electric fields known as an ion trap that serves as a cage for charged particles like ions and electrons. Hans Dehmelt, Nobel Laureate for Isolating Electrons, Dies at 94 2017-04-09T04:00:00Z Each electric field line starts on an individual positive charge and ends on a negative one, so that there will be more field lines if there is more charge. College Physics for AP Courses 2015-08-12T00:00:00Z The cap sends electric fields over the brain and is intended to disrupt the cancerous cells from dividing. Electric brain cap helps survival rates in some cancer patients 2017-04-04T04:00:00Z So by varying the strength of the electric field and counting the electrons that hit the detector, physicists can trace the spectrum. Weighing the universe's most elusive particle 2017-06-29T04:00:00Z The company said its Optune device, which uses electric fields to fight cancer, appeared in a study to improve survival. Fiat Chrysler and Wells Fargo slide; Tesla advances 2017-04-03T04:00:00Z But its unique selling point is that it will measure for the first time the planet’s electric field. Europe attempts Mars landing 2016-10-18T04:00:00Z The electric field strength is, thus, directly proportional to Q . College Physics for AP Courses 2015-08-12T00:00:00Z And earlier this year, an international team of researchers reported16 using an electric field to catalyse the formation of ring-shaped carbon compounds. The new breed of cutting-edge catalysts 2016-09-05T04:00:00Z On each occasion, the rise was very rapid, suggesting that the dust emissions and the electric field were reinforcing each other, Esposito says. Static electricity strengthens desert dust storms 2016-07-08T04:00:00Z What the Temple researchers found was that an electric field applied in the flow direction of a liquid stream of chocolate helped to reduce its viscosity along that direction. Lower-fat chocolate is now possible thanks to electrical engineering 2016-06-20T04:00:00Z When the bees buzzed within 10 centimeters of the flower, the electric field—like static electricity from a balloon—caused the bee’s hair to bend. Video: How bees sense a flower’s electric field 2016-05-30T04:00:00Z Since the electric field strength is proportional to the density of field lines, it is also proportional to the amount of charge on the capacitor. College Physics for AP Courses 2015-08-12T00:00:00Z Neutral nucleation rates are measured with the clearing field electrodes set to ±30 kV, which establishes an electric field of about 20 kV m−1 in the chamber. Ion-induced nucleation of pure biogenic particles : Nature : Nature Publishing Group 2016-05-24T04:00:00Z And in each of those events, the electric field grew stronger than normal, often in just a matter of seconds—bolstering the idea that the shuffling of sand grains generates static electricity. Static electricity strengthens desert dust storms 2016-07-08T04:00:00Z The qubits are the spins of the electrons and nuclei in phosphorus atoms embedded in a silicon lattice, and are controlled using a special system of electric fields. Silicon quantum computers take shape in Australia 2016-05-23T04:00:00Z As the hair moves because of the electric field, it changes the frequency of the laser light that hits it, allowing the vibrometer to keep track of the velocity of motion of the hair. Video: How bees sense a flower’s electric field 2016-05-30T04:00:00Z Not only does the smaller d make the capacitance greater, but many insulators can withstand greater electric fields than air before breaking down. College Physics for AP Courses 2015-08-12T00:00:00Z The ions are guided into the sample flow with an electric field, where they react with sulfuric acid and HOMs. Ion-induced nucleation of pure biogenic particles : Nature : Nature Publishing Group 2016-05-24T04:00:00Z Many of those models estimate the sizes and numbers of dust particles in the atmosphere based on weather conditions, but they don’t include the effects of electric fields. Static electricity strengthens desert dust storms 2016-07-08T04:00:00Z Electroadhesives use voltage to create an electric field that, in turn, generates an opposing distribution of electrical charge on the landing surface. Electric Forces Let Robotic ‘Bees’ Hang Tight 2016-05-19T04:00:00Z This should be easy to detect by checking for the presence of an electric field, even when the bike is stationary. Tiny Motor Powers a New Threat to Cycling Races 2016-04-18T04:00:00Z Another way to understand how a dielectric increases capacitance is to consider its effect on the electric field inside the capacitor. College Physics for AP Courses 2015-08-12T00:00:00Z The Schiaparelli lander will also be the first to examine the planet’s electric field. Mars launch to test collaboration between Europe and Russia 2016-03-10T05:00:00Z Extra sensors measured the electric field 2 meters above the ground. Static electricity strengthens desert dust storms 2016-07-08T04:00:00Z “The brain uses both neurotransmitters and electric fields to communicate,” says Sarah Hollingsworth Lisanby, director of the division of translational research at the National Institute of Mental Health in Bethesda, Maryland. Neurostimulation: Bright sparks : Nature : Nature Publishing Group 2016-03-01T05:00:00Z The solar wind’s negatively charged particles are discharged by means of an “electron gun,” so that the e-sail maintains a positive electric field. New NASA Spacecraft Will Be Propelled By Light 2016-02-03T05:00:00Z The answer is that the changing voltage and electric fields affect the permeability of the adjacent cell membrane, so that the same process takes place there. College Physics for AP Courses 2015-08-12T00:00:00Z By carefully balancing the composition of the ink and the electric field, the researchers have been able to get an even smaller droplet to form at the base of the attached drop. The moving finger moves on 2016-01-28T05:00:00Z That separation of charges creates an electric field that may help electrify some of the dust still bound to sand grains, thus boosting even more of it into the air. Static electricity strengthens desert dust storms 2016-07-08T04:00:00Z The precision of this static shift measurement was limited by the magnitude of the applied electric fields, and by statistical and systematic issues related to accurately measuring small deflections. An improved limit on the charge of antihydrogen from stochastic acceleration : Nature : Nature Publishing Group 2016-01-19T05:00:00Z When placed on a shaved head, the electrodes in the cap deliver low-intensity alternating electric fields to the brain, Sampson said. Electromagnetic Waves May Help Fight Deadly Brain Cancer 2015-12-15T05:00:00Z Within the fish, weak electric fields in the water produce a current in a gel-filled canal that runs from the skin to sensing cells, producing a nerve signal. College Physics for AP Courses 2015-08-12T00:00:00Z In the second, an electric field and membrane separate phosphorus and nitrogen ions from others on the basis of charge and size. Chemistry: Reuse water pollutants 2015-12-01T05:00:00Z When the eel curls up in this horseshoe shape, something similar happens — it produces a strong electric field. Electric Embrace: Eels Curl Up to Supercharge Shocks 2015-10-29T04:00:00Z By searching for the loss of antiatoms caused by these stochastic electric fields, we set a new limit on |Q|. An improved limit on the charge of antihydrogen from stochastic acceleration : Nature : Nature Publishing Group 2016-01-19T05:00:00Z That eerie-sounding musical instrument once popular in science fiction films is played by manipulating an electric field. IU Science Fest will feature ‘zombie’ Einstein vs dinosaurs 2015-10-21T04:00:00Z The electric field caused by their separation opposes the magnetic force, F = qvB , and the electric force, Fe = qE , eventually grows to equal it. College Physics for AP Courses 2015-08-12T00:00:00Z But such colliders use metal-walled cavities that spark if the electric field is too strong. CERN Prepares to Test Revolutionary Mini-Accelerator 2015-10-07T04:00:00Z "When the eel curls its positive and negative poles together and sandwiches the prey in between, you get a focusing of the electric field," Catania said. Electric Embrace: Eels Curl Up to Supercharge Shocks 2015-10-29T04:00:00Z During this relaxation/randomization phase, electric fields are applied that clear the positrons and antiprotons remaining in the trap. An improved limit on the charge of antihydrogen from stochastic acceleration : Nature : Nature Publishing Group 2016-01-19T05:00:00Z However, the properties of the crystal depend on the electric field in it, so the pump beam causes the polarization of the probe beam to change and emerge from the crystal tracing an elliptical pattern. Physicists observe weird quantum fluctuations of empty space—maybe 2015-10-01T04:00:00Z What is emerging in these observations is a connection between magnetic and electric fields. College Physics for AP Courses 2015-08-12T00:00:00Z Anyone who sits through a freshman electricity and magnetism course learns that charged objects carry electric fields, and that moving charges also create magnetic fields. Was Einstein the First to Invent E = mc 2 ? 2015-08-24T04:00:00Z The Munich physicists will observe whether a neutron's magnetic properties behave evenly in the presence of high electric fields and precisely controlled magnetic fields. The Room with the Weakest Magnetic Field on Earth 2015-08-15T04:00:00Z We model the stochastic trials by assigning the antiatoms a putative Q, and propagating them in the presence of the stochastic electric fields for this same 114.9 s. An improved limit on the charge of antihydrogen from stochastic acceleration : Nature : Nature Publishing Group 2016-01-19T05:00:00Z The longer "pump" pulse is polarized horizontally, meaning that the electric field in it oscillates sideways. Physicists observe weird quantum fluctuations of empty space—maybe 2015-10-01T04:00:00Z A moving magnetic field produces an electric field through its induced emf. College Physics for AP Courses 2015-08-12T00:00:00Z Geometrically, this meant applying an electric field to the base of the flame. Young Scientist Makes Jet Engines Leaner and Cleaner with Plasma 2015-07-31T04:00:00Z The effects of DBS for treating Parkinson's are transient: when the electric field is turned off, the tremor returns. Neuroscience: Rewiring the brain : Nature : Nature Publishing Group 2015-06-23T04:00:00Z To generate the stochastic electric field necessary for our measurement, we impose the electric potential shown in Fig. 1c on the trap by biasing the trap electrodes. An improved limit on the charge of antihydrogen from stochastic acceleration : Nature : Nature Publishing Group 2016-01-19T05:00:00Z Electric and magnetic fields are the key to a particle accelerator: because protons are positively charged, they accelerate when in an electric field and bend in a circle in a magnetic field. Proton Smashing Resumes at the World's Largest Particle Accelerator 2015-06-09T04:00:00Z Especially important is his addition of the hypothesis that changing electric fields create magnetic fields. College Physics for AP Courses 2015-08-12T00:00:00Z In their study, Vladan Vuletić, a physicist at the Massachusetts Institute of Technology in Cambridge, and his colleagues mimicked one surface with a row of negatively charged ytterbium ions held in an electric field. Friction of a single atom measured with light 2015-06-03T04:00:00Z Those electrodes create an electric field inside her brain which stops cell division in cancer cells. Mother fights brain cancer with electric fields 2015-06-02T04:00:00Z Unlike conventional thrusters employing chemical reactions, electric thrusters are more efficient, accelerating charged ions through electric fields. Secret Vessel to Test Durability of Materials in Space, NASA Says 2015-05-19T04:00:00Z They sense when and where an object–typically a finger–breaks an electric field. The Michigan Engineer Who Is Revolutionizing Touch Technology 2015-05-06T04:00:00Z Since changing electric fields create relatively weak magnetic fields, they could not be easily detected at the time of Maxwell’s hypothesis. College Physics for AP Courses 2015-08-12T00:00:00Z The differences may provide an effective way to estimate the electric field in a thunderhead. Rays From Exploding Stars May Help Measure Strength of Thunderstorms 2015-04-24T04:00:00Z The electric fields are strong, but are not sufficient in themselves to convert air from an electric insulator to a conductor. Cosmic rays reveal the secrets of thunderstorms 2015-04-22T04:00:00Z Lightning is so poorly understood in part because measuring electric fields inside thunderstorms is challenging. Cosmic rays could reveal secrets of lightning on Earth 2015-04-23T04:00:00Z The varying electric field involved in this phenomenon should be detectable from afar. The chickens are restless 2015-03-26T04:00:00Z Closer examination of the one complete cycle shown in Figure 24.5 reveals the periodic nature of the generator-driven charges oscillating up and down in the antenna and the electric field produced. College Physics for AP Courses 2015-08-12T00:00:00Z Can electric fields help get chemotherapy drugs into tumors? Podcast: Cockroaches with personality, using electric fields to treat cancer, and more 2015-02-06T05:00:00Z They used electric fields to drive chemo compounds specifically into difficult-to-treat tumors in animals, dramatically increasing the drugs’ concentration within the tumor and shrinking it. Electric fields deliver drugs into tumors 2015-02-04T05:00:00Z Existing accelerators send beams of charged particles along evacuated pipes interspersed with cavities filled with electric fields. A new awakening? 2015-01-29T05:00:00Z When stimulated by the eel’s electric field, neurons in prey animals fire, causing these contractions, he says. Electric Eels Remotely Control Victims’ Muscles Before Paralyzing And Eating Them These two centers of charge will terminate some of the electric field lines coming from a free charge, as on a DNA molecule. College Physics for AP Courses 2015-08-12T00:00:00Z Unlike electric eels and other fish that use shocks to stun prey, this fish generates a weak electric field to help it navigate and to locate insects and other prey. Learning How Little We Know About the Brain 2014-11-10T05:00:00Z This reservoir also contained one of two electrodes that create the electric field needed to drive the drug into nearby tumor tissue. Electric fields deliver drugs into tumors 2015-02-04T05:00:00Z According to AWAKE’s spokesman, Allen Caldwell of the Max Planck Institute for Physics in Munich, the electric fields in a machine like this will be 100 times stronger than those of the ILC. A new awakening? 2015-01-29T05:00:00Z The electrons gain energy by surfing the radio waves, and the rate of acceleration depends on the strength of the oscillating electric field within the waves. Physicists crank up current in new type of accelerator 2014-11-07T05:00:00Z The electric field E is a vector and fields due to multiple charges add like vectors. College Physics for AP Courses 2015-08-12T00:00:00Z “It’s a map of all these little directions that the light’s electric field is pointing,” he explained. POLARBEAR Sniffs Out Cosmic Clues About The Universe, Dark Matter And Neutrinos 2014-10-22T04:00:00Z The approach works, DeSimone explains, because many liquid drug molecules are “polar,” which causes them to move in an electric field toward an electrode with an opposite charge from the nearby electrode where they start. Electric fields deliver drugs into tumors 2015-02-04T05:00:00Z It's unclear why sharks bite down on the cables, but one theory is that they confuse the cables with prey because of the electric field around them. Shark counterattack: Google wraps underwater cables with armor 2014-08-15T04:00:00Z An EAP changes its shape when exposed to an electric field. Electroactive Lens May Bring SLR Type Camera Features To iPhone 2014-06-24T04:00:00Z The direction of the electric field is tangent to the field line at any point in space. College Physics for AP Courses 2015-08-12T00:00:00Z This polarisation is the orientation of the cosmic microwave background radiation’s electric field. POLARBEAR Sniffs Out Cosmic Clues About The Universe, Dark Matter And Neutrinos 2014-10-22T04:00:00Z So in the latter case, the electric field generated between the two electrodes pushed the drugs through the skin into the tumor below. Electric fields deliver drugs into tumors 2015-02-04T05:00:00Z If light is polarized it means a majority of its component electromagnetic waves have an electric field that is oscillating along a certain direction as they travel towards the Earth. Blockbuster Big Bang Theory Under Scrutiny Due To... Dust To investigate, the scientists exposed the crustaceans to a stressful situation - in this case an unpleasant electric field. Crustaceans experience 'anxiety' 2014-06-12T04:00:00Z Would the self-created electric field at the end of a pointed conductor, such as a lightning rod, remove positive or negative charge from the conductor? College Physics for AP Courses 2015-08-12T00:00:00Z There are also scientific games based on microfluidic devices that allow players to manipulate living creatures, such as protozoa, using electric fields or chemicals. The game is on 2014-05-07T17:20:03.278Z The focusing of electric fields by particular cochlear implant electrode configurations led to surprisingly efficient gene delivery to adjacent mesenchymal cells. [Research Articles] Close-Field Electroporation Gene Delivery Using the Cochlear Implant Electrode Array Enhances the Bionic Ear 2014-04-29T14:57:47.542Z Thus, the incident electric field ‘seen’ by the vibrating nuclei is frequency modulated and corresponds to a superposition of exponentially decaying spectral components with the carrier frequencies ± nΩ. Coherent control of the waveforms of recoilless γ-ray photons 2014-04-04T22:51:57.673Z Our results show that it is possible to directly manipulate atomic-scale magnetic structures with the electric field of light on a sub-picosecond time scale. [Report] Large-Amplitude Spin Dynamics Driven by a THz Pulse in Resonance with an Electromagnon 2014-03-20T18:26:08.633Z Would the same sign charge be removed from a neutral pointed conductor by the application of a similar externally created electric field? College Physics for AP Courses 2015-08-12T00:00:00Z Schematic of the adiabatic energy levels as a function of external electric field, for interband dipole moment . Addendum: Optical-field-induced current in dielectrics 2014-03-19T18:22:43.387Z When tall objects build up a positive charge underneath a negatively charged storm cloud, they form a cloud of positively charged ions, which helps to dissipate the electric field around them. Wind Turbines Generate "Upside-Down" Lightning [Video] 2014-03-03T21:54:39Z Every fish produces a constant electric field and every species emits at a different frequency. Electric fish inspire agile robots 2014-02-15T19:33:05Z A strong electric field is required to detect a small electric dipole, and one proposed method is to observe the properties of the electron in the internal electric field of a polar molecule. [Perspective] Probing the Electron 2014-01-16T18:55:47.006Z An electric field due to a positively charged spherical conductor is shown above. College Physics for AP Courses 2015-08-12T00:00:00Z Instead of representing quantities by discrete bits, the input and output data are expressed as continuous electric fields of light. [Perspective] Enabling Optical Analog Computing with Metamaterials 2014-01-09T18:55:40.702Z This involves applying a transient magnetic field, which generates an electric field in a particular region of the brain due to Faraday’s law, a bit like attaching a battery to the neural circuitry. A New Method to Measure Consciousness Discovered 2014-01-07T13:15:02.479Z The animals generate an electric field from modified neurons running along their spinal cord. Electric fish inspire agile robots 2014-02-15T19:33:05Z These images show faint electric fields around an idealized flower. 365 days: Images of the year 2013-12-18T18:50:26.658Z The electric field created by two parallel metal plates is shown above. College Physics for AP Courses 2015-08-12T00:00:00Z At the beginning of the 20th century, Robert Millikan suspended drops of oil in an electric field, concluding that electrons have a single charge. The Replication Myth: Shedding Light on One of Science s Dirty Little Secrets 2013-12-04T23:15:51.986Z The higher the flipping frequency and the stronger the electric field, the more tightly the cavities can be packed. Particle accelerators: Small really is beautiful 2013-10-17T15:02:27Z An electric field is a region around a charged particle or object within which a force would be exerted on other charged particles or objects. And Let There Be "Molecules" of Light 2013-10-14T20:45:24.920Z To destroy the metallic tubes the team first used an electric field to turn the semiconducting ones into insulators. A carbonic computer: Cylinder head 2013-09-26T15:05:58Z The +2q particle has an electric field E at distance r and exerts a force F on the +q particle. College Physics for AP Courses 2015-08-12T00:00:00Z It follows electric field lines, it works its way in equipment. New NASA spacecraft to investigate moon mystery 2013-09-04T21:34:46Z In this case the alternating electric field is supplied by light which, being electromagnetic radiation, is actually just an electric field and a magnetic one leapfrogging one another at extremely high frequency. Particle accelerators: Small really is beautiful 2013-10-17T15:02:27Z The electrons will be traveling using a phenomenon called “quantum tunneling” which enables them to pass through electric fields that would otherwise be too strong for them, saving energy. Scicurious Guest Writer! Quantum Machines Become Reality 2013-08-28T13:15:08Z A strong electric field inside the chamber guided the electrons to positions on a planar detector that depended on their initial velocities rather than on their initial positions. A Snapshot of the Inside of an Atom 2013-05-24T19:55:00Z Find the magnitude of the electric field that exerts the force. College Physics for AP Courses 2015-08-12T00:00:00Z An electric field carries these ions across a chamber several inches long against a headwind of purified air. Device Sniffs Out Black Powder Explosives 2013-05-03T18:35:00Z Scientists have known from lab experiments that super-strong electric fields can temporarily convert the air’s electrically neutral molecules into a conductive pathway. Thunderstorms contain ‘dark lightning,’ invisible pulses of powerful radiation 2013-04-08T21:58:00Z This process can be controlled with a small electric field. George Gray, the man who made flat screens possible 2013-03-22T07:00:01Z In the military, they may be able to detect changes in the magnetic and electric fields. I, Quantum Robot 2013-03-18T12:45:05.427Z What will be the direction of the electric field? College Physics for AP Courses 2015-08-12T00:00:00Z Choosing a liquid crystal material with a particular refractive index lets him select which wavelengths to work with, and applying an electric field lets him switch the index between two states. Photonics: Trick of the light 2013-03-13T18:21:07.307Z The trouble is, lightning researchers — despite decades of measurements from balloons, aircraft and rockets — have been unable to locate in thunderclouds electric fields sufficiently strong to trigger this insulator-to-conductor transformation. Thunderstorms contain ‘dark lightning,’ invisible pulses of powerful radiation 2013-04-08T21:58:00Z That suggested that the bees were detecting the electric fields and using them to guide their activities, rather than relying on other clues such as fragrance. Bumblebees Sense Electric Fields in Flowers 2013-02-21T22:15:04.030Z On the other side of the loop, the electric field opposes the electrons' motion and saps their energy. Purported Relativity Paradox Resolved 2013-01-25T20:50:00Z Write an expression for the electric field E along the x-axis as a function of position x in the region between objects S and T in terms of q, d, and fundamental constants, as appropriate. College Physics for AP Courses 2015-08-12T00:00:00Z These embryos responded to predators’ electric fields by stopping all gill movements. Observatory: Some Shark Embryos Can Detect Predators 2013-01-21T23:21:33Z Australian researchers found that the embryos could identify electric fields simulating a nearby predator, despite being confined to a tiny egg case. Shark embryos 'detect predators' 2013-01-10T07:50:23Z As they zero in on their sugary reward, foraging bumblebees follow an invisible clue: electric fields. Bumblebees Sense Electric Fields in Flowers 2013-02-21T22:15:04.030Z By freezing, the embryo may reduce its heart rate, which in turn may also reduce its own electric field, making it harder for predators to notice it. Video: Shark Embryos Sense Electric Fields 2013-01-09T22:00:00Z An electric field is caused by an object with electric charge. College Physics for AP Courses 2015-08-12T00:00:00Z Just as an electric field consists of particles called photons, the Higgs field consists of Higgs bosons woven into the vacuum. [Special Issue News] Breakthrough of the Year: The Discovery of the Higgs Boson 2012-12-20T21:25:17.963Z Also, the team estimates, the stronger the electric field in a sprite, the higher the frequency of radio emissions will be. ScienceShot: Broadcast From On High 2012-12-20T17:15:00Z In plasmonic systems, field localization is generally correlated with local field enhancement, , where El is the local electric field and 0 is the electric field of the incident wave. Controlled-reflectance surfaces with film-coupled colloidal nanoantennas 2012-12-11T21:22:39.403Z The electric field of polarized light bounces up and down on an axis perpendicular to the direction the photons travel in. Space Bursts Provide Insight Into Theory of Everything 2012-12-10T20:45:07.560Z The resistance of a resistor, and the capacitance of a capacitor, can be understood from the basic properties of electric fields and forces, as well as the properties of materials and their geometry. College Physics for AP Courses 2015-08-12T00:00:00Z Physicists assume that empty space is filled with a “Higgs field,” which is a bit like an electric field. [Special Issue News] Breakthrough of the Year: The Discovery of the Higgs Boson 2012-12-20T21:25:17.963Z The electric field from the charge pulls and pushes other free-moving charges in the surface. Turning Pull Into Push? 2012-12-10T19:30:00Z And at least for some commonly fished species including halibut and tuna, the electric fields didn't impact catch rates. ScienceShot: Keeping Hammerheads Out of the Haul 2012-11-29T22:25:00Z The atoms in question were stripped of their outer electrons and trapped in an electric field, in a vacuum, at extremely low temperatures. The 2012 Nobel prizes: Good eggs 2012-10-11T15:07:28Z When a free positive charge q is accelerated by an electric field, such as shown in Figure 19.2, it is given kinetic energy. College Physics for AP Courses 2015-08-12T00:00:00Z Wineland’s group traps beryllium ions in electric fields, and cools them with a laser that excites the ion’s electrons. Physics Nobel for quantum optics 2012-10-10T17:21:07.457Z The strong electric field at the tip polarizes the pieces, pulling their electrons onto one side and leaving a net positive charge on the other, essentially making small electric dipoles. Cavity Quantum Electrodynamics 2012-10-09T20:45:02.517Z Of course, none of the gates works perfectly, because they are limited by such things as laser-intensity fluctuations and noisy ambient electric fields, which compromise the integrity of the ions’ laser-excited motions. Quantum Computing with Ions [Repost] 2012-10-09T18:15:00.540Z At his lab in Boulder, Dr. Wineland traps ions—electrically charged atoms—by surrounding them with electric fields. French, American Scientists Win Nobel 2012-10-09T14:41:16Z Figure 19.2 A charge accelerated by an electric field is analogous to a mass going down a hill. College Physics for AP Courses 2015-08-12T00:00:00Z The protective outfit, known as a Faraday suit, is an adaptation of the Faraday cage - an enclosure of highly conductive material that shields whatever is inside it from an electric field. Magician David Blaine unplugs after high-voltage NYC stunt 2012-10-09T13:50:47Z Wineland used electric fields to trap electrically charged atoms, keeping them away from heat and radiation by conducting his experiments at very low temperatures and in a vacuum. Physics Nobel prize awarded for crucial step towards quantum computing 2012-10-09T13:14:08Z "The electric field of the ion trap holds charged particles in place and Coulomb repulsion causes them to spontaneously form a spatial ring crystal," Zhang said. Eternal Clock Could Keep Time After Universe Dies 2012-09-25T22:15:00.270Z Kahr obtained samples of dye molecules from another researcher at the centre, Alex Jen, and measured their absorption of polarized light — a way to test their alignment — in an electric field. Electro-optic dye triggers ethics row 2012-09-05T17:20:27.440Z For example, water molecules gather ions much more effectively because they have an electric field and a separation of charge to attract charges of both signs. College Physics for AP Courses 2015-08-12T00:00:00Z She was accompanied by a support team in boats, and a kayak-borne apparatus shadowing her to keep sharks at bay by generating a faint electric field. Storms and Stings Push Diana Nyad to End Cuba-To-Florida Swim 2012-08-22T05:15:38Z Instead 10,000 volts going through the needle create an electric field to control the cells. 'Spray-patch' could mend hearts 2012-07-31T00:55:23Z When placed in an electric field, it pulses and swims exactly like its living counterpart. Artificial Jellyfish Built from Rat Cells 2012-07-23T17:15:00.687Z And their paper suggested that the key to the devices’ performance lay in the way the molecules lined up in an electric field. Electro-optic dye triggers ethics row 2012-09-05T17:20:27.440Z Also, as brought out in the previous chapter, polar water provides a shield or screening of the electric fields in the highly charged molecules of interest in biological systems. College Physics for AP Courses 2015-08-12T00:00:00Z And it's long been speculated that Titan contains a hidden liquid layer, based on mathematical modeling and electric field measurements made by the Huygens spacecraft that landed on the surface in 2005. Saturn Moon May Harbor Ocean Below Surface 2012-06-28T19:09:00Z The company plans to use ion thrusters, a high-tech propulsion system in which propellant is ejected using an electric field. Moon tourism: Fly me to the moon 2012-06-28T15:03:25Z When an electric field is applied across the structure, the muscle contracts rapidly, compressing the medusoid and mimicking a jellyfish’s power stroke. Artificial Jellyfish Built from Rat Cells 2012-07-23T17:15:00.687Z The laser creates a strong electric field, which draws electrons away from the helium atoms, allowing the electrons to absorb energy from the electric field. Physicists Invent First Tabletop X-Ray Source 2012-06-08T20:45:03.767Z Electric potential is a scalar, and electric field is a vector. College Physics for AP Courses 2015-08-12T00:00:00Z The scheme focused on photons' polarization—that is, the directions along which their associated electric fields oscillated. The Faster-Than-Light Telegraph That Wasn't 2012-05-29T12:15:00.247Z In fact, what is called a velocity-potential exists, similar to the potential described in Chapter IV above, for an electric field. Lord Kelvin An account of his scientific life and work 2012-04-06T02:00:32.097Z Receptors allow sawfish to detect the electric fields of other animals. Observatory: Sawfish Have Nose for Attacks, and for Strategy 2012-03-12T23:37:05Z The saw-like snouts are used to sense the electric fields produced by other types of fish - their prey. Sawfish use their snouts to hunt 2012-03-06T17:33:36Z Addition of voltages as numbers gives the voltage due to a combination of point charges, whereas addition of individual fields as vectors gives the total electric field. College Physics for AP Courses 2015-08-12T00:00:00Z You might think to dispute this by kicking a rock, but remember that both the rock and your foot are mostly empty space, prevented from intermingling by electric fields. Out There: Cosmologists Try to Explain a Universe Springing From Nothing 2012-02-20T19:17:28Z Sorry, but I am just a pessimist when it comes to things that benefit all of us. . santhip 10:56 am 02/7/2012 what about stimulating using magnetic fields rather than just electric fields ? Ethical Questions Surround "Electrical Thinking Cap" That Improves Mental Functions 2012-02-08T18:47:27.007Z In earlier research, Dr. Wueringer’s team found that the snouts of freshwater sawfish are covered with thousands of receptors that allow them to detect the electric fields of other animals and plan an attack. Observatory: Sawfish Have Nose for Attacks, and for Strategy 2012-03-12T23:37:05Z It uses liquid helium to cool neutrons to almost absolute zero, then observes whether their behaviour changes in an electric field. Efforts to Measure Neutron's Charge Are Plagued by Difficulties 2012-02-01T15:45:10.403Z The maximum electric field strength above which an insulating material begins to break down and conduct is called dielectric strength. College Physics for AP Courses 2015-08-12T00:00:00Z Changes to α are driven by imbalances between the electric field energy and magnetic field energy. Inconstant Constants 2011-12-31T05:15:18.567Z There can, therefore, be no electrostatic strain and no lines of force within the material of a conductor where the electric field has become steady. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z Imagine that an electron, for example, is a marble sitting in one of two depressions separated by a small hill, which represent the effects of a sculpted electric field. Walk-Through-Wall Effect Might Be Possible With Humanmade Object, Physicists Predict 2011-11-29T22:53:47Z But the researchers have been stymied because the liquid helium boils and begins to break down as stronger electric fields are applied. Efforts to Measure Neutron's Charge Are Plagued by Difficulties 2012-02-01T15:45:10.403Z What is the strength of the electric field in a region where the electric potential is constant? College Physics for AP Courses 2015-08-12T00:00:00Z It was the gee whiz element — an electric field hat — that got me interested when I first saw the data for this presented. Cancer-Fighting Electric Hat Proves We Live In The Future 2011-04-15T20:08:06Z The fish generates an electric field of about 1 millivolt per centimeter at a frequency that ranges from 50 to 2000 hertz. Time on the Brain: How You Are Always Living In the Past, and Other Quirks of Perception 2011-09-16T16:15:10.063Z But while our electric field rotates to the right by 90 degrees, its evil antimatter twin also rotates the same way! Galactic Challenge Part III: The "Easy" Solutions 2011-09-12T18:15:05.793Z The idea is to make the channel as thin as possible, allowing the electric field generated by the gate to penetrate the entire thing, thus improving the control that the gate is able to exert. Transistors: Plugging the leaks 2011-08-17T19:17:49Z Explain in your own words why equipotential lines and surfaces must be perpendicular to electric field lines. College Physics for AP Courses 2015-08-12T00:00:00Z The depressions, or crypts, are the site for this newly-discovered sensory ability A South American dolphin is the first "true mammal" to sense prey by their electric fields, scientists suggest. The dolphin that hunts with electric sense 2011-07-26T23:23:41Z All animals generate weak electric fields from the activity of their muscles and nerves. Guiana Dolphins Can Use Electric Signals to Locate Prey 2011-07-27T00:03:00Z If instead the electric field on that plane were going left, the motion would be in a left-handed spiral. Galactic Challenge Part III: The "Easy" Solutions 2011-09-12T18:15:05.793Z And just as an electric field consists of quantum particles called photons, the Higgs field consists of Higgs bosons lurking "virtually" in the vacuum. Particle Physicists Report Possible Hints of Long-Sought Higgs Boson 2011-07-22T17:51:03Z Membrane walls of living cells have surprisingly large electric fields across them due to separation of ions. College Physics for AP Courses 2015-08-12T00:00:00Z Researchers used the blood vessels of the heart to carry a pulsed electric field to sites of maximum electrical disturbance. A Less Shocking Way to Reset a Broken Heart 2011-07-13T20:18:35Z The applied force of the electric field, however, gives the net motion a preferred direction: the ion is a little likelier to move in one direction than in the other. The Fundamental Physical Limits of Computation 2011-06-01T17:45:02.143Z When the wave’s electric field aligns with the first rod, the aliens’ apparatus would record a maximum electric field there, say, going “up.” Galactic Challenge Part III: The "Easy" Solutions 2011-09-12T18:15:05.793Z According to physicists' standard model, a "Higgs field," a bit like an electric field, pervades empty space and drags on other particles to produce the effects of mass. Particle Physicists Report Possible Hints of Long-Sought Higgs Boson 2011-07-22T17:51:03Z What is the voltage across an 8.00 nm–thick membrane if the electric field strength across it is 5.50 MV/m? College Physics for AP Courses 2015-08-12T00:00:00Z Modeling showed that perturbing the electric field at these points would be enough to destroy the rotor waves and allow the heart to return to normal operation. A Less Shocking Way to Reset a Broken Heart 2011-07-13T20:18:35Z “We designed the three-dimensional structure to provide an intrinsic electric field distribution that promotes efficient charge transport and high efficiency in converting energy from sunlight into electricity.” Nanocone-Tips Take Solar Cell Efficiency to Next Level 2011-05-02T19:58:09Z At the same instant, one-fourth of a wavelength ahead, the electric field would be rotated by 90 degrees either to the left or to the right. Galactic Challenge Part III: The "Easy" Solutions 2011-09-12T18:15:05.793Z The team used different techniques to measure both the local and global electric field potentials in the brain. Surreptitious Sleep States Uncovered 2011-04-27T21:15:00.460Z What is the electric field strength between the plates? College Physics for AP Courses 2015-08-12T00:00:00Z The Food and Drug Administration just approved a hat that generates electric fields to fight a deadly form of brain cancer. Cancer-Fighting Electric Hat Proves We Live In The Future 2011-04-15T20:08:06Z In traditional optical rectification, light’s electric field causes a charge separation, or a pulling apart of the positive and negative charges in a material. Solar Power Without Solar Cells? 2011-04-14T13:43:57Z If the direction of the electric and magnetic oscillation is always the same instead of turning randomly–for example, if the electric fields always oscillate vertically–the wave is called linearly polarized. Galactic Challenge Part III: The "Easy" Solutions 2011-09-12T18:15:05.793Z In such a case, an electric field is said to exist in the medium. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z What are the magnitude and direction of the local electric field? College Physics for AP Courses 2015-08-12T00:00:00Z In physics, a particular application is that to the area which is influenced by some agent, as in the magnetic or electric field. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 3 "Fenton, Edward" to "Finistere" 2011-03-14T03:01:00.580Z Several aquatic animals, including sharks and eels, as well as the platypus, are capable of sensing changes in the electric field - electroreception. Sixth Sense? Give Me A Break! 2011-03-11T18:45:06.163Z In an antimatter world, the small things that orbit atoms would be anti-electrons, also known as positrons, and they would accelerate in the direction of the electric field, not the opposite. Galactic Challenge Part III: The "Easy" Solutions 2011-09-12T18:15:05.793Z It should be noted that the strength of the electric field and the mechanical force are numerically equal only when the dielectric constant of the medium is unity. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z What is the magnitude of the average electric field? College Physics for AP Courses 2015-08-12T00:00:00Z Perhaps we may illustrate his position by saying that the elements undergo a change analogous to what takes place in iron, when by being brought into an electric field it becomes magnetic. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 8 "Ethiopia" to "Evangelical Association" 2011-03-05T03:00:24.537Z This polarization produces a new electric field, which is directed opposite to the original field. Gravity, by George Gamow [Special Archive Article] 2011-03-04T13:45:00.433Z We may describe, through all the points in an electric field which have the same potential, surfaces called equipotential surfaces, and these will be everywhere perpendicular or orthogonal to the lines of electric force. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z It is very convenient to represent an electric field by means of what are called lines of electric force. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z As isolines of electric potential get closer together, the electric field gets stronger. College Physics for AP Courses 2015-08-12T00:00:00Z That question can only be answered by examining whether or not the particles move in an electric field. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z Then a metal is placed in an electric field, the free electrons move to one side of the material, giving it a negative charge and leaving the opposite side positive. Gravity, by George Gamow [Special Archive Article] 2011-03-04T13:45:00.433Z Let us suppose any other surface described in the electric field so as to cut the closely compacted tubes. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z The lines of electric force will thus completely represent the electric field. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z An electric field is needed to supply energy to move the charges. College Physics for AP Courses 2015-08-12T00:00:00Z Thunderstorms are known to create tremendously high electric fields - evidenced by lightning strikes. Antimatter 'streams from storms' 2011-01-11T08:34:33Z Thus while an electron and a proton would fall with equal acceleration in a gravitational field, when these particles are placed in an electric field the electron is accelerated 1,836 times' faster. Gravity, by George Gamow [Special Archive Article] 2011-03-04T13:45:00.433Z We can deduce a remarkable expression for the energy stored up in an electric field containing electrified bodies as follows:19 Let V denote the potential at any point in the field. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z The electric field being X, and the magnetic field H, the forces on a particle were in the same direction, and equal to eX, evH. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z These free electrons respond by accelerating when an electric field is applied. College Physics for AP Courses 2015-08-12T00:00:00Z Dr. Fenn improved a technique known as mass spectrometry, which identifies molecules like proteins by how quickly they are accelerated in an electric field. John B. Fenn, Nobel Winner Who Developed Way to Study Large Molecules, Dies at 93 2010-12-13T02:58:00Z Researchers commonly nudge atoms with an STM's electric field to rearrange them. Technique Turns Computer Chip Defects Into an Advantage 2010-12-10T16:23:00Z We must, however, assume that the charge Q is so small that it does not sensibly disturb the original electric field, and that the dielectric constant of the insulator is unity. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Observations were made of the equilibrium and motion of these charges under the combined influence of gravity and a strong vertical electric field, the intensity of which could be varied at will. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z When a voltage source is connected to a conductor, it applies a potential difference V that creates an electric field. College Physics for AP Courses 2015-08-12T00:00:00Z In this technique, called electrospray ionization, a strong electric field dispersed charged droplets. John B. Fenn, Nobel Winner Who Developed Way to Study Large Molecules, Dies at 93 2010-12-13T02:58:00Z Buehler suggested that the pulsar’s own electric field helped accelerate the electrons in the inner part of the nebula to energies high enough to emit the gammas. Crab Nebula Outbursts Shock Astronomers 2010-12-08T19:35:00Z Let any line drawn in an electric field be divided up into small elements of length. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z The direction of the electric field at any point is defined to be the direction of the mechanical force acting on a unit positive charge placed at that point. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z The electric field in turn exerts force on charges, causing current. College Physics for AP Courses 2015-08-12T00:00:00Z With the proteins separated, scientists could then employ the usual technique of mass spectrometry, applying an electric field to accelerate the molecules and measure their mass. John B. Fenn, Nobel Winner Who Developed Way to Study Large Molecules, Dies at 93 2010-12-13T02:58:00Z In a second experiment the team applied an electric field to one clock, sending the aluminum ion moving back and forth. Everything Really Is Relative 2010-09-24T14:32:00Z It defines the condition which must be fulfilled by the potential at any and every point in an electric field, through which ρ is finite and the electric force continuous. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Ion engines use electric fields, instead of chemical reactions, to propel rockets and satellites. In Faulty Hayabusa Space Probe, a Test of Japan?s Expertise 2010-07-01T16:40:00Z Considering the nature of electric fields at the surface of conductors, why would you expect most of the current to flow from the sharp edge of the scalpel? College Physics for AP Courses 2015-08-12T00:00:00Z Dr Prance’s version uses ultra-sensitive electrodes to record the effects of bodily electrical signals on the ambient electric fields that pervade a room, and deduce from that what is going on. Medical technology: Watching your health 2010-06-24T11:19:00Z The initial exchange of electrons creates a charged electric field between the layers, in an area called the P-N junction. Solar energy offers a vast supply of power, but harnessing it is a challenge 2010-06-22T04:00:00Z It's an array of electrodes resembling a tightfitting helmet that bathes the cancer in a faint electric field, scrambling the inner workings of the rampaging cells and preventing them from multiplying. Helmet zapping brain tumors with electricity 2010-06-12T03:55:00Z The scientists applied a force to the ions by imposing an additional electric field on them. Measuring small things: The force is weak with this one 2010-04-22T10:36:00Z It is a distinct difference from electric field lines, which begin and end on the positive and negative charges. College Physics for AP Courses 2015-08-12T00:00:00Z The diffusion field has similar properties to the magnetic and the electric field. The Mechanism of Life When an electric field is produced between the plates, the velocity of the ions between the plates is increased in proportion to the strength of the electric field. A Brief Account of Radio-activity The electric fields resonate at a frequency designed to do no harm to healthy brain tissue. Helmet zapping brain tumors with electricity 2010-06-12T03:55:00Z She was surrounded by an atmosphere of womanliness as delicate as an electric field, which warned off and repelled any disturbing element. The Vision of Elijah Berl For a uniform electric field, the relationship between electric field and voltage is E = ε / l , where l is the width of the conductor and ε is the Hall emf. College Physics for AP Courses 2015-08-12T00:00:00Z This is a phenomenon entirely unknown in the magnetic or electric fields, where two poles of the same sign, one on either side of a pole of the contrary sign, give two separate spindles. The Mechanism of Life In the electric field those negatively charged seek the positive plate and those positively charged seek the negative plate. A Brief Account of Radio-activity The helmet is the first cancer therapy to use alternating polarities in electric fields as a way to disrupt the cell-division process known as mitosis. Helmet zapping brain tumors with electricity 2010-06-12T03:55:00Z Simple considerations, however, will show that it would require exceedingly strong electric fields to produce an appreciable effect. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" The velocity selector has both an electric field and a magnetic field, perpendicular to one another, producing forces in opposite directions on the ions. College Physics for AP Courses 2015-08-12T00:00:00Z By analogy with the magnetic and electric fields we may designate the hypertonic pole as the positive pole of diffusion, and the hypotonic as the negative pole. The Mechanism of Life The rapidity of this action depends upon the strength of the electric field and experiment shows that the stronger the field the smaller the number of condensation drops formed. A Brief Account of Radio-activity People hear 'electric fields' and of course they are skeptical. Helmet zapping brain tumors with electricity 2010-06-12T03:55:00Z Another method which has been employed by Rutherford and McClelland is based on the action of an electric field in destroying the conductivity of gas streaming through it. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" List the ways in which magnetic field lines and electric field lines are similar. College Physics for AP Courses 2015-08-12T00:00:00Z In order to have an electromagnetic wave, one must have a medium in which an electric field or a magnetic field may exist. Where I Wasn't Going If there is no electric field, a cloud can be produced some time after the shutting off of the source of radiation, showing that time is required for the recombination of the ions. A Brief Account of Radio-activity When a body is electrified, the latter at the same time creates an ether stress about it, which is called an electric field. The Machinery of the Universe Mechanical Conceptions of Physical Phenomena In this case the electric field is so strong and the velocity of the ion so great that the preceding methods are not applicable. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" For example, electric force is parallel to electric field lines, whereas magnetic force on moving charges is perpendicular to magnetic field lines. College Physics for AP Courses 2015-08-12T00:00:00Z In other words it creates an electric field that doubles for sound. Empire They are slightly deflected in strong magnetic and electric fields. A Brief Account of Radio-activity They matched and neutralized our electric field defense screen just an hour ago, leaving us at their mercy. The Sword and the Atopen Hence we see that the value of α, when it is independent of the electric field, is equal to the reciprocal of the free path. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" Draw gravitational field lines between 2 masses, electric field lines between a positive and a negative charge, electric field lines between 2 positive charges and magnetic field lines around a magnet. College Physics for AP Courses 2015-08-12T00:00:00Z Instead of radiating sound waves mechanically, it radiates a changing electric field and this field becomes audible directly within the ear. Empire They show a strong deflection in magnetic and electric fields, have less ionizing power than the alpha rays, and a velocity of the same order as light. A Brief Account of Radio-activity The representation of the condition of these facts by a psychic field, compared to the magnetic or electric field, becomes, therefore, if not plausible, at least convenient. Genuine Mediumship or The Invisible Powers |
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