Q 12-01-020NEETJEE MainTop questionMedium
The electric field at a point on the axis of a short dipole is $E$. At a point at the same distance on its equatorial line, the field is
Answer: (D) $\dfrac{E}{2}$, in the opposite direction
Axial: $\dfrac{2kp}{r^3}$ along $\vec{p}$. Equatorial: $\dfrac{kp}{r^3}$ opposite to $\vec{p}$. So the equatorial field is $\dfrac{E}{2}$, pointing the other way.
Solution by Sreeraj P, M.Sc Physics