J & K CET Medical J & K - CET Medical Solved Paper-2010

  • question_answer
    If a current of 5 A in a coil of self inductance 2 mH is cut-off in time 0.1 s, the induced emf in the coil is

    A)  0.1 V                                    

    B)  0.01 V

    C)  0.2 V                                    

    D)  0.02 V

    Correct Answer: A

    Solution :

                     Induced \[e=L\frac{di}{dt}=2\times {{10}^{-3}}\times \frac{5}{0.1}\]\[=0.1V\]


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