We also talked about transformers, and how they use mutual inductance to change voltage.

还谈到了变压器，以及 它如何使用互感来改变电压。

Inductance, by the way, is expressed in units called Henrys.

顺便说一下，电感以 称为亨利的示。

Finally, we described how mutual inductance is used in wireless chargers.

最，描述了如何 在无线充电器中使用互感。

And because we have an inductance L and a resistance R, we call this configuration an LR circuit.

因为有一个电感 L 和一个电阻 R，所以称这种配置为 LR 电路。

Mutual inductance is also used in lots of other things, too – like wireless chargers, for example.

互感也被用于许多其他方面——例如无线充电器。

L is a constant, known as the inductance, signifying how well that specific coil induces an opposing current, depending on its shape and size.

L。L 是一个常数，称为电感，示特定线圈感应反向电流的程度，具体取决于其形状和大小 。

All those voltage changes are made using transformers, which take advantage of something called mutual inductance, where a change in the current in one coil leads to a change in emf in another, nearby coil.

所有这些电压变化都是使用变压器进行的，变压器利用了一种称为互感的东西，其中一个线圈中的电流变化会导致附近另一个线圈的电动势发生变化。