A conducting ring of copper is held such that the plane of the ring is perpendic

Question

A conducting ring of copper is held such that the plane of the ring is perpendicular to the vertical direction (the plane of the ring is horizontal). A bar magnet is held above the ring with its dipole axis vertical, with the south magnetic pole at the bottom and the north magnetic pole at the top. The following sequence of events occurs, all without changing the orientation of the magnet: a) first the magnet is held in place without moving, b) then the magnet is moved down toward the ring, c) next the magnet is stopped and held in place, d) finally, the magnet is moved back to its original place. For each segment of the motion (a-d) describe the current in the ring. Specify whether it is zero, counter-clockwise as viewed looking down from above, or clockwise as viewed looking down from above.

Explanation / Answer

a) 0 b) clockwise c) 0 d) counter-clockwise

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