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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Electric Dipole

  • question_answer
    A given charge is situated at a certain distance from an electric dipole in the end-on position experiences a force F. If the distance of the charge is doubled, the force acting on the charge will be                                        [MNR 1986]

    A)                    2F

    B)                                      F / 2

    C)                    F / 4

    D)                                      F / 8

    Correct Answer: D

    Solution :

                       Force on charge \[F=q\,({{E}_{a}})=q\times \frac{k.2p}{{{r}^{3}}}\] Þ \[F\propto \frac{1}{{{r}^{3}}}\] When r ® doubled; F ® \[\frac{1}{8}\]times


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