1. A double loop of wire of radius 40 mm lies in a plane perpendicular to a uniform magnetic field. The field changes from 200 milli-T to 350 milli-T in 0.1 seconds. (a) How much voltage is induced in the loop? (b) If B is pointing out of the paper toward you, which way does the induced current flow?
2. A wire rectangle, 13 cm by 17 cm, has a resistance of 1.8 ohms. The magnetic field inside the loop is uniform and described by the equation B = B0e-at, where B0 = .65 Tesla and a = 200 s-1. The field is perpendicular to the plane of the loop. What is the current induced in the loop at the times (a) t = 0 s, (b) .05 s, (c) 2 s?