Replica of Oersted's 1820 experiment showing a current-carrying conductor will deflect a magnetic needle.
In 1820, Hans Christian Oersted of Denmark, found that there was a relationship between electricity and magnetism. He discovered that a wire carrying an electric current would exert a force upon a magnet. Oersted found that if a magnet needle were placed near a wire, an electrical current would make the needle turn at right angles to the wire.
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