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CMC Medical CMC-Medical Ludhiana Solved Paper-2013

  • question_answer
    The work done in, deflecting a compass needle of magnetic moment M through an angle \[\theta \] from its equilibrium position is [\[H=\] horizontal] component of the earths magnetic field

    A)  \[MH\sin \theta \]                         

    B)  \[MHcos\theta \]

    C)  \[MH(1-\sin \theta )\] 

    D)  \[MH\,(1-\cos \theta )\]

    Correct Answer: D

    Solution :

                    Work done in deflecting the needle of magnetic moment M in magnetic field it \[W=MH\,(1-\cos \theta )\]


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