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JIPMER Jipmer Medical Solved Paper-2001

  • question_answer
    A point Q lies on the perpendicular bisector of an electrical dipole of dipole moment p. If the distance of Q from the dipole is r (much larger than the size of the dipole), then electric field at Q is proportional to:

    A)  \[p\,\text{and}\,{{r}^{-3}}\]                                      

    B)  \[{{p}^{2}}\,\text{and}\,{{r}^{-3}}\]       

    C)  \[p\,\text{and}\,{{r}^{-2}}\]                      

    D)         \[{{p}^{-1}}\,\text{and}\,{{r}^{-2}}\]

    Correct Answer: A

    Solution :

    Electric field at Q. \[{{E}_{equatorial}}=\frac{kp}{{{r}^{3}}}\] hence \[E\propto p\]


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