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    Question

    What is the principle behind the working of a

    transformer?ย ย 
    A Faradayโ€™s law of induction Correct Answer Incorrect Answer
    B Ohmโ€™s law Correct Answer Incorrect Answer
    C Lenz's law Correct Answer Incorrect Answer
    D Coulombโ€™s law Correct Answer Incorrect Answer

    Solution

    A transformer works on Faraday's law of induction.ย ย  It uses electromagnetic induction to change the voltage in alternating current (AC) circuits.ย ย  A varying current in the primary coil induces a varying magnetic field, which in turn induces a current in the secondary coil.ย ย  This allows voltage to be increased or decreased.

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