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JEE Main & Advanced Physics Electro Magnetic Induction Question Bank Faraday's and Lenz's Law

  • question_answer
    A coil having an area \[2{{m}^{2}}\] is placed in a magnetic field which changes from \[1Wb/{{m}^{2}}\]to \[4Wb/{{m}^{2}}\]in a interval of 2 second. The e.m.f. induced in the coil will be [DPMT 1999; MP PET 2002]

    A)             4 V                                           

    B)            3 V

    C)             1.5 V                                       

    D)            2 V

    Correct Answer: B

    Solution :

               \[|e|\,=A.\frac{\Delta B}{\Delta t}=2\times \frac{(4-1)}{2}=3\ V\].


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