Are the answers A for(a) and B for(b)? Explanation please. E16T.6 A circular con

Question

Are the answers A for(a) and B for(b)? Explanation please.

E16T.6 A circular conducting loop falls toward a bar mag- net, as shown in the diagram below. (a) In which direction does current flow in the loop? A. Clockwise (when viewed from above) B. Counterclockwise (when viewed from above). C. No current flows in this loop. D. We need more information to answer. (b) Does the magnet repel or attract the falling loop? A. It attracts the loop. B. It repels the loop. C. It does not exert any force on the loop. D. One needs more information to answer.

Explanation / Answer

(a)

As the loop falls towards the South end of the bar magnet, the flux associated with the loop increases and an induced current flows in the loop to counter the increasing flux(Lenz's law). The direction of the current is Anticlockwise when viewed from the above.

(b)

It repels the falling loop as the loop(due to increasing flux) acts like a south pole when viewd from below to oppose the increasing flux(Lenz's law).

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