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

  • question_answer
    The current in a coil decreases from 1 A to 0.2 A. In 10sec. Calculate the coefficient of self inductance. If induced emf is 0.4 volt.                                                                         [BCECE 2004]

    A)            5 H

    B)            3 H

    C)            4 H

    D)            2 H

    Correct Answer: A

    Solution :

               \[e=-L\frac{di}{dt}\Rightarrow 0.4=-\frac{L(0.2-1)}{10}\]\[\Rightarrow L=5\ H\]


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