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

  • question_answer
    When current in a coil changes to 2 ampere from 8 ampere in \[3\times {{10}^{-3}}\,\sec ond\], the e.m.f. induced in the coil is 2 volt. The self inductance of the coil in millihenry is [MP PET 1995]

    A)            1    

    B)            5

    C)            20  

    D)            10

    Correct Answer: A

    Solution :

               \[e=L\frac{di}{dt}\] Þ\[2=L\times \frac{6}{3\times {{10}^{-3}}}\Rightarrow L=1\ mH\]


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