JEE Main & Advanced Physics Magnetism Question Bank Magnet and its Properties

  • question_answer
    A magnet when placed perpendicular to a uniform field of strength \[{{10}^{-4}}Wb/{{m}^{2}}\] experiences a maximum couple of moment\[4\times {{10}^{-5}}N/m.\]. What is its magnetic moment  [Bihar MEE 1995]

    A)            \[0.4A\times {{m}^{2}}\]

    B)            \[0.2A\times {{m}^{2}}\]

    C)            \[0.16A\times {{m}^{2}}\]      

    D)            \[0.04A\times {{m}^{2}}\] (e)     \[0.06A\times {{m}^{2}}\]

    Correct Answer: A

    Solution :

               \[{{C}_{\max }}=MB\Rightarrow 4\times {{10}^{-5}}=M\times {{10}^{-4}}\Rightarrow M=0.4\ A\times {{m}^{2}}\]


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