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Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2004

  • question_answer
    The field at a point distant r from an electric dipole is proportional to

    A)  1/r                                        

    B)  1/r2

    C)  1/r3                                      

    D)  r2

    Correct Answer: C

    Solution :

    Electric field due to dipole at any point is \[E=\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{p\sqrt{1+3{{\cos }^{2}}\theta }}{{{r}^{3}}}\]                 \[\Rightarrow \]               \[E\propto \frac{1}{{{r}^{3}}}\]


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