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

那个领域什么变？这就是诱发电动势的原因。机翻

2.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 发变化，从电动势。

3.Yeah, but the EMF's no good. - Why?

没有 EMF不能用 - 怎么会？

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

没有电动势反应 这点很确定。

5.I just swept the Telesca house with the EMF. It's clean.

我用EMF把特莱斯卡的房子扫视过一 没什么发现。

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

电动势，你会记得，代表电动势，这是导致电子移动并形成电流的原因。机翻

7.So an emf is induced in the second coil.

因此在第二个线圈中感应出一个电动势。

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

通过环路的磁通量发变化， 从电动势。

9.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，我们会说电动势等于通量变化随间变化的负数。机翻

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

这意味着通过线圈中的环路的磁通量会随着间变化，这就是感应电动势的原因。

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

随着间的变化，电动势的强度等于磁通量变化的负值。

12.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动势或电动势对抗电流。

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

这种与主电流相反的电动势的感应 称为自感。

14.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电动势或电动势，从电流。

15.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，我们将这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动势。机翻

16.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动势，从可以使用该能量为电池充电。

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

这种关系也以相反的方式起作用，变化的磁通量会与磁通量相反的电动势。

18.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， 您会得到一个低于我们理想的电动势的值。机翻

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

它是负的，因为感应电动势 与主电流方向相反。

20.And to calculate an induced emf, you just take the change in current over time and multiply it by negative L.

要计算感应电动势，只需将电流随间的变化乘以负。