A loop of current-carrying wire has a magnetic dipole moment of 5.0 x 10-4A. m. The moment initially is aligned with a 0.50-T magnetic field. To rotate the loop so its dipole moment is perpendicular to the field and hold it in that orientation, you must do work of: Select one: a. -1.0 x 10-3 J O b. OJ O c. 2.5 x 10-4 J O d. -2.5 x 10-4 J O e. 1.0 x 10-3 J