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WB JEE Medical WB JEE Medical Solved Paper-2006

  • question_answer
    The electric potential at a point on the axis of an electric dipole depends upon the distance \[r(>>a)\] of the point from centre of the dipole as:

    A)  \[\propto r\]                                    

    B)  \[\propto \frac{1}{r}\]

    C)  \[\propto \frac{1}{{{r}^{2}}}\]                  

    D)  \[\propto \frac{1}{{{r}^{3}}}\]

    Correct Answer: C

    Solution :

                     The electric potential at any point on the axis of electric dipole, \[V=\frac{p}{4\pi {{\varepsilon }_{0}}{{r}^{2}}}\]                 or            \[V\propto \frac{1}{{{r}^{2}}}\]


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