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12th Class Physics Alternating Current / प्रत्यावर्ती धारा Question Bank MCQ - Alternating Currents

  • question_answer
    In a transformer, the no. of turns of primary and secondary coils are 500 and 400 respectively. If 220 V is supplied to the primary coil, then ratio of currents in primary and secondary coils is:

    A) 4:5                   

    B) 5:4   

    C) 5:9                   

    D) 9:5

    Correct Answer: A

    Solution :

    (a) 4:5             \[\frac{{{l}_{P}}}{{{l}_{S}}}=\frac{{{V}_{S}}}{{{V}_{P}}}=\frac{{{N}_{S}}}{{{N}_{P}}}=4:5\]


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