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NEET Sample Paper NEET Sample Test Paper-57

  • question_answer
    In a transformer, the number of turns of primary coil and secondary coil are 5 and 4 respectively. If 220V is applied in the primary coil then the ratio of primary current to the secondary current will be:

    A) 9:4                               

    B) 5:9   

    C) 5:4                               

    D) 4:5

    Correct Answer: D

    Solution :

    [d] Transformer ratio \[\frac{{{N}_{P}}}{{{N}_{S}}}=\frac{{{V}_{P}}}{{{V}_{S}}}=\frac{{{I}_{S}}}{{{I}_{P}}}\] \[\frac{{{N}_{P}}}{{{N}_{S}}}=\frac{{{I}_{S}}}{{{I}_{P}}}\] \[\frac{5}{4}=\frac{{{I}_{S}}}{{{I}_{P}}}\] \[\frac{{{I}_{P}}}{{{I}_{S}}}=\frac{4}{5}\]


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