JEE Main & Advanced Physics Magnetism Question Bank Magnetic Equipments

  • question_answer If a brass bar is placed on a vibrating magnet, then its time period

    A)            Decreases

    B)            Increases

    C)            Remains unchanged         

    D)            First increases then decreases

    Correct Answer: B

    Solution :

               Because moment of inertia increases i.e. \[T\propto \sqrt{I}\]

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