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    Question

    A transformer has 1000 turns in the primary and 100 in

    the secondary coil. If input voltage is 220 V, output voltage is:
    A 22 V Correct Answer Incorrect Answer
    B 2.2 V Correct Answer Incorrect Answer
    C 2200 V Correct Answer Incorrect Answer
    D 110 V Correct Answer Incorrect Answer

    Solution

    Transformers work on the principle: Vs/ Vp = Ns /Np. Substituting, Vs =100/1000 × 220 = 22V. Since fewer turns in the secondary, it's a step-down transformer.

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