It turns out that magnetic fields do induce electric currents.

事实证明，磁场确实会 产生电流。

When Faraday discovered that magnetic fields induce electric currents, he got kind of lucky.

当法拉第发现磁场 感应电流时，他有点幸运。

So with this equation, you can see the connection between a changing magnetic flux and an induced electric field.

即使使用这个方程，您也可以看到变化的磁通量和感应电场之间的联系。

If a changing electric field is generated, then a magnetic field is induced, which results in a changing magnetic field that induces an electric field, and the cycle continues.

如果产生变化的电场，则感应出磁场，改变驱动电场的磁场，循环继续。

That is, until two physicists, Joseph Henry and Michael Faraday, both on their own, figured out what was happening: It turns out that magnetic fields do induce electric currents.

也就是说，直到两位物理学家约瑟夫·亨利和迈克尔·法拉第独自弄清楚发生了什么：事实证明磁场确实会感应电流。