An electric dipole of moment 'p' is placed in an electric field of intensity 'E'. The dipole acquires a position such that the axis of the dipole makes an angle θ with the direction of the field. Assuming that the potential energy of the dipole to be zero when θ = 90°, the torque and the potential energy of the dipole will respectively be
1
pE cos θ, -pE sin θ
2
pE sin θ, -pE cos θ
3
pE sin θ, -2pE cos θ
4
pE sin θ, 2pE cos θ