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CMC Medical CMC-Medical VELLORE Solved Paper-2007

  • question_answer
    A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If a steady current I is established in the wire as shown in the figure, the loop will

    A)  rotate about an axis parallel to the wire

    B)  move away from the wire

    C)  move towards the wire

    D)  remain stationary

    Correct Answer: C

    Solution :

                     Wires placed close to each other carry current in the same direction and hence attract. Wires placed far apart carry current in opposite direction and hence repel each other. But here attraction is strong and repulsion is weak. So, loop moves towards the wire.


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