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

Answer

A

Explanation

Conceptual