Michael Faraday, FRS (22 Sep 1791–Aug 25 1867) was an English chemist and physicist who studied the magnetic field around a conductor carrying a DC electric current, and established the basis for the magnetic field concept in physics. He discovered electromagnetic induction, diamagnetism, and laws of electrolysis.
Michael Faraday did an experiment on December 26th, 1831, in which he co-rotated a magnet with a copper disk and measured a current output. Even though he had done that experiment, his own law of induction tended to ignore that fact.
Known for over 150 years, the operation of Faraday homopolar generator whose current generation could not be properly explained. The world later embraced Faraday’s two piece induction generator, whose drawbacks include mechanical friction and electrical losses.