lec11 - Origin of Magnetic Field H.C. Oersted discovered...

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Origin of Magnetic Field H.C. Oersted discovered (in 1820) that an electric current produces a magnetic field . Magnetic field of a long, straight current-carrying wire Magnitude : Direction: of B follows RHR -2 . Magnetic field of a long, current-carrying loop ( radius R ) Magnitude at center Direction: of B follows RHR -2 . Magnetic field of a long solenoid with n turns per unit length Magnitude in interior: r I B π µ 2 0 = R I B 2 0 = nI B 0 =
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Ferromagnetism Ferromagnetism arises from magnetic fields present at the atomic level due to motion of electrons (orbital and spin).
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This note was uploaded on 12/06/2011 for the course PHYSICS 111&112 taught by Professor Unknown during the Spring '11 term at Ohio State.

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lec11 - Origin of Magnetic Field H.C. Oersted discovered...

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