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by big p on March 9th, 2008

big p

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Electrical can you give me an explanation why a back EMF is developed across a coil when an alternating potential differance is applied across it?

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  • by PerpetualAFK on March 15th, 2008

    PerpetualAFK

    It's because of Faraday's induction law. A current through a coil will induce a magnetic field. The magnetic field will attempt to resist the initial flow of current (due to conservation of energy). This causes the back EMF.

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