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

  • question_answer
    A metal rod of length 2 m is rotating with an angular velocity of 100 rad/sec in a plane perpendicular to a uniform magnetic field of 0.3 T. The potential difference between the ends of the rod is                                                [MP PET 2003]

    A)            30 V                                         

    B)            40 V

    C)            60 V                                         

    D)            600 V

    Correct Answer: C

    Solution :

               \[e=\frac{1}{2}B{{l}^{2}}\omega =\frac{1}{2}\times 0.3\times {{(2)}^{2}}\times 100=60V\]


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