Maybe you've seen those looping arcs of magnetism around a bar magnet when it affects iron filings on a piece of paper.

你可能见过条形磁铁周围的弧形磁力线，它在一张纸上通过吸引铁屑展现出来。

Because Earth behaves like it has a giant bar magnet in it, and your compass needle will point north towards Earth's magnetic pole.

因为地球的内部就像有一个巨大的条形磁铁，而你的指南针会向北指向地球的磁极。

You can think of the Earth as a giant bar magnet, where the magnetic field lines go from magnetic north to south.

您可以将地球想象成一个巨大的磁棒，磁力线从地磁北向南延伸。

So by moving the magnet closer to the loop, you essentially made the magnetic field from the bar magnet point more strongly upward.

因此，通过将磁铁移近环路，您基本上可以使来自条形磁铁的磁场更强烈地指向上方。

In the first scenario, you move the north pole of the bar magnet closer to the loop, which increases the magnetic field flowing through the loop.

在第一种情况下，您将条形磁铁的北极移近环路，这会增加流经环路的磁场。

To get a better feel for how to apply Lenz’s law, let’s look at two scenarios involving a bar magnet below a loop of wire, with the north pole of the magnet facing the loop.

为了更好地了解如何应用楞次定律，让我们看一下两个场景，其中一个条形磁铁位于线圈下方，磁铁的北极朝向线圈。

To get a better feel for how to apply Lenz's law, let's look at two scenarios involving a bar magnet below a loop of wire, with the north pole of the magnet facing the loop.

为了更好地了解如何应用楞次定律，让我们看一下两个场景，其中涉及一个线圈下方的条形磁铁，磁铁的北极朝向线圈。

If you chop a bar magnet in half, you don't end up with one north magnet and one south magnet – you end up with two magnets, each with its own north pole and south pole.

如果你把一个条形磁铁切成两半，你最终不会得到一个北极磁铁和一个南极磁铁——你最终会得到两个磁铁，每个磁铁都有自己的北极和南极。