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16 September, 10:13

A coil of wire is comprised of 5 turns, has a current of 2 mA running through it, and a net magnetic field at its center of B is equal to start fraction mu naught over 40 end fraction times T. What is the radius of the coil of wire?

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  1. 16 September, 10:14
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    20cm

    Explanation:

    A coil wire comprises of 5 turns, it has a current of 2mA

    A net magnetic field at the center of B is equal to Mu over 40 end fractions times T

    The radius of a coil of wire with N turns is r = 0.28 m. A clockwise current of Icoil = 1.0 A flows in the coil,

    Therefore 40/2mA = 20
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