A) \[E\]
B) \[\frac{E}{4}\]
C) \[\frac{E}{2}\]
D) \[2E\]
Correct Answer: C
Solution :
When a dipole AB of very small length is taken, then for a point p located at a distance r from the axis the electric field is given by \[E=\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{2p}{{{r}^{3}}}\] ??(i) where p is dipole moment. When dipole is rotated by \[{{90}^{o}},\] then electric field is given by \[E'=\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{p}{{{r}^{3}}}\] ?.(ii) From Eqs. (i) and (ii), we get \[E'=\frac{E}{2}\]You need to login to perform this action.
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