A magnet is hung by a string and then' placed near a wire as shown. When the switch is closed, the magnet rotates such that the ends of the magnet move as indicated by the arrows.
At the instant the switch is closed determine:
a) The direction of the current through the wire segment nearest the magnet. Explain.
b) The direction of the force exerted by the magnet on the wire segment (assume the magnet is in the position shown). Explain.
