JEE Main & Advanced Physics Electro Magnetic Induction Question Bank Application of EMI (Motor, Dynamo, Transformer)

  • question_answer
    In a step-up transformer the voltage in the primary is 220 V and the current is 5A. The secondary voltage is found to be 22000V. The current in the secondary (neglect losses) is    [Kerala PMT 2002]

    A)            5 A

    B)            50 A

    C)            500 A                                       

    D)            0.05 A

    Correct Answer: D

    Solution :

               \[\frac{{{V}_{p}}}{{{V}_{s}}}=\frac{{{i}_{s}}}{{{i}_{p}}}\Rightarrow \frac{220}{22000}=\frac{{{i}_{s}}}{5}\Rightarrow {{i}_{s}}=0.05\ amp\]


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