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EAMCET Medical EAMCET Medical Solved Paper-2006

  • question_answer
    The magnetic induction of a distance d from the magnetic pole of unknown strength m is B. If an identical pole is now placed at a distance of 2d from the first pole, the force between the two poles is:

    A)  mB                                       

    B)  \[\frac{mB}{2}\]

    C)  \[\frac{mB}{4}\]                             

    D)  2mB

    Correct Answer: C

    Solution :

                     \[B=\frac{{{\mu }_{0}}}{4\pi }\frac{m}{{{d}^{2}}}\] \[\therefore \]  \[F=mB\] \[=m\times \frac{{{\mu }_{0}}}{4\pi }\frac{m}{{{(2d)}^{2}}}\] \[=\frac{m}{4}B\]


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