7. A circular loop of conducting wire is placed in a magnetic field perpendicular to the plane of the loop as in Figure 4. The magnitude of the magnetic field varies with time according to the expression B(t) = (0.04t2 + 0.06t + 0.03) T were t is in seconds. At t = 3s, determine the magnitude and direction of (a) the induced current in the loop if the resistance of the wire is 20 02, (b) the induced electric field at point A, and (e) the induced electric field at point B which is at a distance 1.5 m from the center. R - Im XI X 0.5 m X Figure 4