Magnetic FieldsProf. Stephen Sekula10/15/2010Supplementary Material for PHY1308 (General Physics – Electricity and Magnetism)Magnetic Field Line ConventionsHans Christian Oersted1777-1851Danish physicist and chemist.Observed in 1819 that an electric current caused a compass needle to deflect. This observation caused quite a stir. Electricity and magnetism were related phenomena.Crooke's Tube
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