JEE Main & Advanced Physics Magnetism Question Bank Self Evaluation Test - Magnetism and Matter

  • question_answer
    A short bar magnet of magnetic moment \[0.4J\,{{T}^{-1}}\] is placed in a uniform magnetic field of\[0.16\,T\]. The magnet is in stable equilibrium when the potential energy is

    A) \[-0.64J\]

    B) zero 

    C) \[-0.082\,J\]

    D) \[0.064\,J\]

    Correct Answer: D

    Solution :

    [d] For stable equilibrium \[U=-MB=-(0.4)(0.16)=-0.064\,J\]


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