19. A positively charged sphere is Suspended between two large metal plates as shown in the diagram. A wire is placed between the poles of a horseshoe magnet and connected to the metal plates. When the wire is drawn horizontally to the right the charged ball is observed to swing toward the right-hand metal plate. A. Determine the direction of the induced electron flow in the wire in the horseshoe magnet. Justify your answer. B. Is the top pole ofthe magnet a north pole or a south pole? Justify your