A "square" loop of wire with sides of 40 cm is in a uniform magnetic field perpendicular to its area. If the field's initial strength is 10 mT, and it decays to zero in 0.010 s, what is the average emf induced in the loop? In the above problem, what would be the induced emf if the sides of the loop were cut in half--in other words it was a square loop of 20 cm on a side?