A single circular metallic loop is held stationary. A bar magnet is moving along the axis of the loop. An observer, looking at the loop from the side of the magnet, observes that the induced current in the loop is counter-clockwise. Which of the following describes the possible pole of the magnet facing the loop and its state of motion?

Step-by-step solution

An observer looking at the loop from the side of the magnet sees a counter-clockwise induced current. According to the right-hand grip rule, a counter-clockwise current means the face of the loop towards the observer (and the magnet) acts as a North magnetic pole. By Lenz's law, the induced magnetic pole opposes the change in magnetic flux that produces it. A North pole is induced on the loop's face either to repel an approaching North pole or to attract a receding South pole. Therefore, the magnet must either have