the magnitude of the electric field between the two circular parallel plates in figure below is a = (4.0x 105 ) (6.0x 104 t), with e in volts per meter and t in seconds. at t = 0, e is upward. the plate area is 4.0x102 m 2 . for t 0,what are the (a) magnitude and (b) direction (up or down) of the displacement current between the plates and (c) is the direction of the induced magnetic field clockwise or counterclockwise in the figure?