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A loop of wire is connected to an ammeter, as shown above, and held in place. The ammeter has a scale with zero in the middle and a needle that moves away from zero in either direction to measure the magnitude and direction of any current in the loop. A bar magnet is held above the center of the loop and released from rest. Is there a force exerted by the magnet on the loop as the magnet falls through it? Why or why not? A No. Because the loop is not magnetized, it will not be affected by the magnet. B No. Because the loop is not moving, there are no forces on it. C Yes. Because the magnetic field due to current in the loop exerts a force on the magnet, the magnet also exerts a force on the loop. D Yes. Because gravity acts on the loop, the magnet must exert a force on the loop to keep it at rest.