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MGIMS WARDHA MGIMS WARDHA Solved Paper-2006

  • question_answer
    If a current of 3 A flowing in the primary coil is reduced to zero in 0.01 s then the induced emf in the secondary coil is 1500 V, the mutual inductance between the two coils is:

    A) 0.5 H                                     

    B) 5 H

    C) 1.5H                                      

    D) 10 H

    Correct Answer: B

    Solution :

    Mutual inductance \[e=-M\frac{di}{dt}\] \[1500=-M\left( \frac{0-3}{0.01} \right)\] \[M=\frac{1500\times 0.01}{3}\]                 \[=5H\]


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