A rectangular loop of wire with sides 0.219 and 0.531 m lies ina plane perpendicular to a constant magnetic field (see parta of the drawing). The magnetic field has a magnitude of0.765 T and is directed parallel to the normal of the loop's surface. In a time of 0.231 s, one-half of the loop is then foldedback onto the other half, as indicated in part b of thedrawing. Determine the magnitude of the average emf induced in theloop.