6. A bar magnet is held above the center of a wire loop lying in the horizontal

Question

6. A bar magnet is held above the center of a wire loop lying in the horizontal plane, as shown in the figure below. The poles of the magnet is also shown as N (north) and S (south.) loop After the magnet is dropped, what is true of the current in the loop as viewed above. a. It is clockwise as the magnet falls through the loop. b. It is counterclockwise as the magnet falls through the loop. c. It is first counterclockwise as the magnet approaches and then clockwise after it has passed through. It is first clockwise as the magnet approaches and then counterclockwise after it has passed through d.

Explanation / Answer

As the bar magnet approaches the loop from above, with its south end downward, the magnetic flux through the area enclosed by the loop is directed upward and increasing in magnitude. To oppose this increasing upward flux, the induced current in the loop will flow clockwise,  as seen from above

Hence option (a) is correct.

It is clockwise as the magnet falls through the loop.

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