Answer
(a) greater than
(b) greater than
Work Step by Step
(a) In the given scenario, the poles of the loop's field line up with the magnet, causing a repulsion and resisting the magnet. Thus, the tension in the string is greater than the loop's weight.
(b) We know that the poles of the loop's field line up with the magnet causing an attraction and resisting the loop's motion upward and away from the magnet. Thus, the tension is greater than the loop's weight.
