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Hans Christian Oersted, Danish physicist, 1851. Oersted (1777-1851) discovered that electric current has an effect on a magnetic needle
Hans Christian Oersted, Danish physicist, [c1870]. Oersted (1777-1851) discovered that electric current has an effect on a magnetic needle
Hans Christian Oersted, Danish physicist, 1820 (c1880). Oersted (1777-1851) observing that electric current has an effect on a magnetic needle