JEE Main & Advanced Physics Electro Magnetic Induction Question Bank Static EMI

  • question_answer
    A varying current in a coil changes from 10 amp to zero in 0.5 sec. If average EMF is induced in the coil is 220 volts, the self-inductance of coil is [EAMCET 1994; MH CET (Med.) 1999]

    A)            5 H

    B)            10 H

    C)            11 H                                         

    D)            12 H

    Correct Answer: C

    Solution :

               \[|e|\,=L\frac{di}{dt}\Rightarrow 220=L\times \frac{10}{0.5}\]\[\Rightarrow L=11\ H\]


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