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。

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。

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

你会记得，电动势代表电动势，它是导致电子移动并形成电流的原因。

If you remember, Faraday's Law of Induction says that a changing magnetic field will induce an electromotive force in a loop of wire.

如果你还记得的话，法拉第定律说变化的磁场会在线圈中感应出电动势。

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动势或电动势，从而产生电流。

Scientists say that the battery is a source of electromotive force, because it gets charge to move – but it’s not really providing a force, but rather a difference in electrical potential.

科学家们说， 电池是电动势的来源， 因为它需要充电才能移动——但它并不是真正提供力， 而是提供电势差。

Scientists say that the battery is a source of electromotive force, because it gets charge to move – but it's not really providing a force, but rather a difference in electrical potential.

科学家们说，电池是电动势的来源，因为它使电荷移动——但它实际上并不提供力，而是提供电位差。