\\ly/small dipole with magnetic moment 7.5 x 10'2 Am2 is oriented initially with its magnetic moment perpendicular to a uniform magnetic field of magnitude 2.50 T. What is the change in potential energy of the magnet when it is rotated 90 degrees, so that its magnetic moment is parallel to the field? Initial Final ma .umag E ['3' _A. 0 J b. + 0.188 J C. - 0.188 J D. + 0.375 J E - 0.375 J