Well, no traces of EMF, that's for sure.

没有电反应 点很确定。

And emf, you’ll recall, stands for electromotive force, which is what causes electrons to move and form a current.

电，你会记得，代表电，是导致电子移并形成电流的原因。

And when that field changes? That’s what induces an emf.

那个领域什么时候改变？就是诱电的原因。

So the magnetic flux through the second coil changes, which induces an emf.

因此，通过第二个线圈的磁通量会 生变化，从而产生电。

So an emf is induced in the second coil.

因此在第二个线圈中感应出一个电。

The magnetic flux through the loop changes, which induces an emf.

通过环路的磁通量生变化， 从而产生电。

And that flux seeks to oppose the current with an electromotive force, or emf, in the opposite direction.

并且该通量试图以相反方向的电或电对抗电流。

In maths terms, we’d say that the emf is equal to the negative of the change in flux, over the change in time.

在数学术语中，我们会说电等于通量变化随时间变化的负数。

The strength of the emf is equal to negative of the change in the magnetic flux, over the change in time.

随着时间的变化，电的强度等于磁通量变化的负值。

First, in the early 1800s, Michael Faraday showed us how a changing magnetic field induces an electromotive force, or emf, resulting in an electric current.

首先，在 19 世纪初，迈克尔·法拉第向我们展示了变化的磁场如何产生电或电，从而产生电流。

This induction of an emf that opposes the main current is called self-inductance.

种与主电流相反的电的感应 称为自感。

This means that the magnetic flux through the loops in the coil changes over time, which is what induces an emf.

意味着通过线圈中的环路的磁通量会随着时间而变化，就是感应电的原因。

And it's negative, because the induced emf is in the opposite direction of the main current.

它是负的，因为感应电 与主电流方向相反。

These days, we call this idea Faraday’s Law of Induction: It says that a changing magnetic field will induce an emf in a loop of wire.

如今，我们将个想法称为法拉第感应定律：它说变化的磁场会在线圈中感应出电。

The AC power running through the charging pad induces an emf in your phone's coil, which can use the energy to charge its battery.

流经充电板的交流电源会在手机线圈中感应出电，从而可以使用该能量为电池充电。

So, when you measure the actual voltage between the terminals of the battery, you get a value that’s less than our ideal emf potential.

因此，当您测量电池端子之间的实际电压时， 您会得到一个低于我们想的电的值。

And this relationship works the opposite way as well, with a changing magnetic flux inducing an emf that opposes the flux.

种关系也以相反的方式起作用，变化的磁通量会产生与磁通量相反的电。

And if the flux increases over time, the emf decreases.

如果通量随时间增加，则电会 降低。

So, when you measure the actual voltage between the terminals of the battery, you get a value that's less than our ideal emf potential.

因此，当您测量电池端子之间的实际电压时，您会得到低于我们想电电位的读数。

But when it comes to inducing emf, what really matters is how the flux is changing over time.

但是当涉及到感应电时，真正 重要的是通量如何随时间变化。