The magnetic field through a one-turn loop of wire 16 cm in radius and 8.5 W in resistance changes with time as shown in Fig. 34-42 below. Calculate the emf in the loop as a function of time. Consider the time intervals (a) t = 0 to t = 2 s; (b) t = 2 s to t = 4 s; (c) t = 4 s to t = 8 s. The uniform magnetic field is perpendicular to the plane of the loop.