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    Question

    A transformer works on which

    principle?
    A Ohm’s Law Correct Answer Incorrect Answer
    B Ampere’s Law Correct Answer Incorrect Answer
    C Faraday’s Law of Electromagnetic Induction Correct Answer Incorrect Answer
    D Coulomb’s Law Correct Answer Incorrect Answer

    Solution

    A transformer changes the voltage level using the principle of mutual induction. This is governed by Faraday’s Law, which states that a changing magnetic flux induces an emf in a coil. A transformer uses alternating current to create varying magnetic flux in the core, inducing voltage in the secondary coil. Hence, it operates on Faraday’s Law.

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