An electric dipole 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 `theta` with the direction of the field. Assuming that the potential energy of the dipole to be zero when `theta= 90^(@)`, the torque and the potential energy of the dipole will respectively be

Options

A. pE sin`theta`, 2p E cos `theta`
B. pE cos `theta`, - pE sin `theta`
C. pE sin` theta`, -pE cos `theta`
D. pE sin` theta`, - 2pE cos `theta`

Answer

C