A) zero
B) \[F/2\]
C) \[F/4\]
D) \[F/8\]
Correct Answer: D
Solution :
The intensity on axis line of dipole at any point \[E=\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{2p}{{{d}^{3}}}\] \[F=qE\] \[=\frac{2qp}{4\pi {{\varepsilon }_{0}}.{{d}^{3}}}\] Or \[F\propto \frac{1}{{{d}^{3}}}\] The force at distance 2d from centre \[F'={{\left( \frac{d}{2d} \right)}^{3}}F\] \[F'=\frac{F}{8}\]You need to login to perform this action.
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