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NEET AIPMT SOLVED PAPER 1999

  • question_answer
                      A bar magnet of magnetic moment \[\vec{M}\] is placed in a magnetic field of induction \[\vec{B}\]. The torque exerted on it is:                                                                                                                                                                

    A)                 \[\vec{M}\,\vec{B}\]

    B)                 \[-\vec{M}\,\vec{B}\]   

    C)                 \[\vec{M}\times \,\vec{B}\]

    D)                 \[-\vec{M}\times \,\vec{B}\]

    Correct Answer: C

    Solution :

                              When a bar magnet is placed in an external magnetic field \[\vec{B}\], a magnetic torque \[\vec{\tau }\] acts on it, which is given by \[\vec{\tau }\] = \[\vec{M}\times \vec{B}\]


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