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NEET Sample Paper NEET Sample Test Paper-88

  • question_answer
    A bar magnet of magnetic moment \[\overrightarrow{M}\] is placed in the magnetic field \[\overrightarrow{B}.\] The torque acting on the magnet is

    A) \[\overrightarrow{M}\times \overrightarrow{B}\]    

    B)        \[\overrightarrow{M}-\overrightarrow{B}\]

    C) \[\frac{1}{2}\,\overrightarrow{M}\times \overrightarrow{B}\]          

    D)        \[\overrightarrow{M}+\overrightarrow{B}\]

    Correct Answer: A

    Solution :

    [a] Torque acting on a magnet when it is rotated by \[\theta {}^\circ \] from its equilibrium position is MB sin \[\theta \] which is equivalent to \[\overrightarrow{M}\times \overrightarrow{B}.\]


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