A square coil of wire of side 2.80 cm is placed in a uniform magnetic field of magnitude 1.25T directed into the page as in the figure. The coil has 28.0 turns and resistance of 0.780 ohms. If the coil is rotated through an angle of 90 degrees about the horizontal axis shown in 0.335 s, find the magnitude of the average emf induced in the coil during this rotation.
