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JEE Main & Advanced Sample Paper JEE Main Sample Paper-21

  • question_answer
    A bar magnet is oscillating in magnetic field of earth with a time period T. If its mass becomes 4 times of initial mass, what will be the effect on the time period and motion?

    A)  New time period is 4T motion remains SHM

    B)  New time period is T/2 motion remains SHM

    C)  New time period is nearly T but motion is not SHM.

    D)  New time period is 2T motion is SHM

    Correct Answer: D

    Solution :

    \[T=2\pi \sqrt{\frac{m{{l}^{2}}/12}{MB}}\]


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