Piezoelectric quartz crystals in the sonar's transmitter vibrated when they were subjected to alternating voltage.

声纳发射器中的压电石英晶体在受到交流电压时会振动。

Let's look at a circuit with only an alternating voltage source and a capacitor.

让我们看一个只有交流 电压源和电容器的电路。

Each component will behave differently when connected to the source of alternating voltage. .

当连接到交流电压源时，每个组件的行为都会有所不同。

As the alternating voltage is applied across the inductor, the opposing emf that's induced equals the amount of voltage that drops across the device.

当交流电压施加在电感器上时，感应的反向电动势等于器件两端的电压下降量。

Now, this same derivation works for alternating voltage, as well, with the RMS value of voltage being equal to the peak voltage divided by the square root of 2.

现在，同样的推导也适用于交流电压，电压的 RMS 值等于峰值电压除以 2 的平方根。