The electric field due to an electric dipole at a distance `r` from its centre in axial position is `E`. If the dipole is rotated through an angle of `90^(@)` about its perpendicular axis, the electric field at the same point will be

Options

A. E
B. `E//4`
C. `E//2`
D. 2E

Answer

C

Explanation

`E_("axis") = (2Kp)/(r^3)`
`E_("equatorial") = (Kp)/r^3`
`implies E_e = E_a/2`