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J & K CET Medical J & K - CET Medical Solved Paper-2005

  • question_answer
    The intensity of magnetic field due to an isolated pole of strength m at a point distant r from it will be :

    A) \[\frac{m}{{{r}^{2}}}\]                                   

    B) \[m{{r}^{2}}\]

    C) \[\frac{{{r}^{2}}}{m}\]                                   

    D) \[\frac{m}{r}\]

    Correct Answer: A

    Solution :

                     The magnetic field\[(\overrightarrow{B})\]due to an isolated pole at a distance r from it is given by \[B=\frac{{{\mu }_{0}}}{4\pi }.\frac{m}{{{r}^{2}}}\]where m is pole strength.


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