Nikola Tesla | Biography, Facts, & Inventions | Britannica

Nikola Tesla, (born July 9/10, 1856, Smiljan, Austrian Empire [now in Croatia]—died January 7, 1943, New York, New York, U.S.), Serbian American inventor and engineer who discovered and patented the rotating magnetic field, the basis of most alternating-current machinery. He also developed the three-phase system of electric power transmission. Link: https://www.britannica.com/biography/Nikola-Tesla