An electric dipole having point charges (+q ) and (-q ), separated by a fixed distance (d ) is kept under the influence of a uniform electric field ( E ), such that the axis of the dipole is making an angle ( =45^ ) with the direction of ( E ), as shown in the figure. If the electric dipole is allowed to rotate in the (x y )-plane with its center being stationary, what is the magnitude of the net torque acting on the