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BHU PMT BHU PMT (Mains) Solved Paper-2005

  • question_answer
    A magnetic needle suspended by a silk-thread is vibrating in the earth's magnetic field. If the temperature of the needle is increased by \[1000{}^\circ C,\] then:

    A)  the needle stops vibrating

    B)  the time period decreases

    C)  the time period increases

    D)  the time period remains unchanged

    Correct Answer: A

    Solution :

                     The needle will stop vibrating as at this high temperature, the needle loses its magnetism.


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