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JEE Main & Advanced Sample Paper JEE Main Sample Paper-34

  • question_answer
    A magnet oscillates in a magnetic field with periodic time T. If its mass is made four times without changing other variables then what will be the effect on its periodic time and velocity.

    A)  it will oscillate with 4T periodic time

    B)  it will oscillate with 2T periodic time

    C)  it will not oscillate but will perform periodic motion with same time period

    D)  it will oscillate with 3T as periodic time.

    Correct Answer: B

    Solution :

    \[T=2\pi \,\sqrt{\frac{m{{l}^{2}}}{12MB}}\] on making mass 4 times, time period becomes two times.


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