Assertion: electromagnetic generator | /r/HasProperty | the faraday disk
Facets:
Source sentences:
text: The first electromagnetic generator, the Faraday disk, was invented in 1831 by British scientist Michael Faraday.
text: He also built the first electromagnetic generator, called the Faraday disk; a type of homopolar generator, using a copper disc rotating between the poles of a horseshoe magnet.