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JEE Main & Advanced Physics Magnetism Question Bank Graphical Questions

  • question_answer
    The figure illustrate how B, the flux density inside a sample of unmagnetised ferromagnetic material varies with B0, the magnetic flux density in which the sample is kept. For the sample to be suitable for making a permanent magnet [AMU 2001]

    A)            OQ should be large, OR should be small

    B)            OQ and OR should both be large

    C)            OQ should be small and OR should be large

    D)            OQ and OR should both be small

    Correct Answer: B

    Solution :

               In the given figure OQ refers to retentivity while OR refers to corecivity, for permanents both retentivity and corecivity should be high.


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