He experimented by wrapping two insulated coils of wire around an iron ring. He found that, upon passing a current through one coil, a momentary current was induced in the other coil— mutual induction. If he moved a magnet through a loop of wire, an electric current flowed in that wire.

How was Faraday's law discovered?

Faraday discovered that if the magnetic field through a loop of wire varies in time then an emf is induced around the loop. Faraday was able to observe this effect because the emf gives rise to a current circulating in the loop.

Who discovered electromagnetic induction and how?

On August 29 in 1831, British scientist Michael Faraday discovered electromagnetic induction, a seminal breakthrough which laid the groundwork for later researchers such as James Clerk Maxwell, and led to important inventions such as electric motors, transformers, inductors, and generators.