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AIIMS AIIMS Solved Paper-2015

  • question_answer
    If the magnetizing field on a ferromagnetic material is increased, its permeability

    A) decreased

    B) increased

    C) is unaffected

    D) may be increased or decreased

    Correct Answer: A

    Solution :

                    Magnetic permeability of substance \[=-|B||A|\frac{d\cos \theta }{dt}=|B||A|\sin \theta .\omega \]where, H is the magnetizing or magnetic field. So, the magnetizing field on a ferromagnetic material is increasing, its permeability decreased.


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