Who Discovered the magnetic field?

André-Marie Ampère
Alessandro Volta
Hans Christian Oersted
Michael Faraday
Danish physicist and chemist Hans Christian Oersted (1777-1851) discovers in 1820 that electric current affects a compass needle and create magnetic fields. He was the first scientist to find the connection between electricity and magnetism. He is remembered today for Oersted's Law.
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André-Marie Ampère
Alessandro Volta
Hans Christian Oersted
Michael Faraday
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