A water molecule is placed just above the centre of a charged non-conducting disc that is lying flat on a table. The surface charge density on the...

A water molecule is placed just above the centre of a charged non-conducting disc that is lying flat on a table. The surface charge density on the disc is +3.2µC m^−2 , and the molecule’s dipole moment has magnitude 6.2×10^−30 C·m and points due West. Find the magnitude and direction of the torque exerted by the disc’s electric field on the molecule.

answer = 1.1×10^−24 N·m directed due North