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12 August, 07:42

If a transformer doubles its input voltage, what is the current in the secondary coil if the primary coil is 10 A.

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  1. 12 August, 08:03
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    20Amp

    Explanation:

    Using the transformer formula

    Vs/Vp = Ns/Np = Ip/Is

    Vs/Vp = Ip/Is

    Vp is the primary voltage = input voltage

    Vs is the secondary voltage = output voltage

    Ip is the current in the primary coil

    Is is the amount of current in the secondary coil.

    If the transformer doubles its input voltage Vp, its output voltage Vs will be

    decreased by 2 but the output current will be doubled

    Given the input current Ip = 10A, the current in the secondary coil (output current) will be doubled i. e Is = 2 (10) = 20A
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