From the Super Mario Wiki
Michael Faraday was an English scientist who studied into the fields of physics and chemistry, notably identifying benzene. He was born to a poor blacksmith and became the apprentice of a bookbinder at a young age. He became interested in science and attended the lectures of Humphry Davy at a young age. He was self-educated and submitted a bunch of the notes he took to Davy, and he soon became Davy's apprentice. Under him, Faraday became an excellent scientist, becoming a lecturer in his own right that made scientific lectures interesting for the average person and especially children, and most notably discovering the link between magnetic fields and electricity (later called Faraday's law of induction). In Mario's Time Machine, the Magnet that Faraday used for his experiments is stolen by a time traveling Bowser, preventing him from completing his discoveries.
Mario's Time Machine
According to Mario's Time Machine, Faraday was in his laboratory in London circa 1831 when his Magnet is stolen by Bowser. He then meets Mario after the latter travels back in time himself to return the Magnet. As Mario does not know that the Magnet belongs to Faraday, if he talks to Faraday regardless, he asks if he has discovered Faraday, and Faraday replies that he has. Faraday says that he is on the verge of an "electrifying" discovery, and he does not want Mario to disturb him. Mario then asks various nearby people, including Faraday's wife, Sarah Barnard, about Faraday and the Magnet. After absolutely confirming that the Magnet belongs to Faraday, he returns to the laboratory and tells Faraday that he has found his Magnet. Faraday excitedly takes it from Mario and immediately puts it to use in his experiment. He then explains to Mario how the experiment works, including how a current of electricity is generated when he passes the Magnet through a coil of wire. Mario remarks that Faraday is now able to power big machines, and Faraday is surprised by Mario's audacious comments. He is not sure what practical applications his findings may have, but he is sure that the government plans to tax it.