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CMC Medical CMC-Medical Ludhiana Solved Paper-2013

  • question_answer
    An elastic circular wire of length \[l\] carries a current 1. It is placed in a uniform magnetic field B (out of paper) such that its plane is perpendicular to the direction of B. The wire will experience

    A)  no force

    B)  a stretching force

    C)  a compressive force

    D)  a torque

    Correct Answer: A

    Solution :

                    Angle between normal to plane and B is\[90{}^\circ \]. Because plane of circular wire is perpendicular to B. \[F=Bil\,\sin \theta \]     \[=Bil\,\sin \theta \]     \[=0\]


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