J & K CET Engineering J and K - CET Engineering Solved Paper-2003

  • question_answer
    A copper ring is held horizontally and a bar magnet with its length along the axis of the ring is dropped through the ring. The acceleration of the falling magnet is

    A)  less than that due to gravity

    B)  equal to that due to gravity

    C)  more than that due to gravity

    D)  depends on the length of the magnet and diameter of the ring

    Correct Answer: A

    Solution :

    When the magnet falls down, an induced current is produced in the coil which opposes, the falling of the magnet, when the magnet is approaching the coil as well as when it is going


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