A plane electromagnetic wave is generated due to the initiation of current along the y direction in a current sheet in the xy plane at z = 0. A steady flow current is switched on at t = 0. This current sheet generates a traveling "front" of the electric and magnetic fields. infinite current sheet in x, y plane Pz Current is in y direction, as shown by arrows. Consider the case at the instant when the "front" is at the point Pz on the positive z axis. Determine the direction of B at Pz