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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2010

  • question_answer
    An emf of 100 mV is induced in a coil when the current in another nearby coil becomes 10 A from zero in 0.1 s. The coefficient of mutual induction between the two coils will be

    A)  1 mH                                    

    B)  10 mH

    C)  100 mH               

    D)         1000 mH

    Correct Answer: A

    Solution :

    Induced emf                                 \[e=M\frac{di}{dt}\]                 \[100\times {{10}^{-3}}=M\left( \frac{10}{0.1} \right)\]                                 \[M={{10}^{-3}}H\]                                 \[M=1mH\]


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