List of top Physics Questions on Electric Dipole asked in JKCET

The dipole moment of a dipole in an uniform external field $ \vec{E} $ is $ \vec{P} $ . Then, the torque $ (\tau ) $ acting on the dipole is

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^{\circ} $ about its perpendicular axis, the electric field at the same point will be