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JEE Main & Advanced Sample Paper JEE Main Sample Paper-7

  • question_answer
    Equi-potential surfaces due to a point charge are shown here. The electric field created by these equi-potential surfaces can be best written as

    A)  \[\frac{kq}{r}\]                                

    B)  \[\frac{kq}{{{r}^{2}}}\]

    C)  \[\frac{kq}{{{r}^{3}}}\]                                 

    D)  \[\frac{2kq}{{{r}^{3}}}\]

    Correct Answer: B

    Solution :

    If \[E=\frac{kq}{{{r}^{2}}}\] then \[V=-\int_{{}}^{{}}{Edr=\frac{kq}{r}}\] The equi-potential surfaces shown due to the point charge have potential of \[V=\frac{kq}{r}\].


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