American troops march through a liberated Paris, the King of Pop is born, The Beatles perform their last concert before paying fans, and Hurricane Katrina hits the Gulf Coast, all on this day.
1831: Using his "induction ring," an iron ring wrapped two insulated coils of wire, English scientist Michael Faraday discovers electromagnetic induction: the "induction" or generation of electricity in a wire by means of the electromagnetic effect of a current in another wire. The induction ring is the first electric transformer.
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