Fewpal
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In the arrangement shown in Figure, there are two coils wound on a non-conducting cylindrical rod. Initially, the key is not inserted. Then the key is inserted and later removed. Then 

(a) the deflection in the galvanometer remains zero throughout 

(b) there is a momentary deflection in the galvanometer but it dies out shortly and there is no effect when the key is removed

(c) there are momentary galvanometer deflections that die out shortly; the deflections are in the same direction 

(d) there are momentary galvanometer deflections that die out shortly; the deflections are in opposite directions

1 Answer

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The answer is (d) there are momentary galvanometer deflections that die out shortly; the deflections are in opposite directions

When key is plugged galvanometer shows deflection in one direction and the direction of deflection reverses if we unplug the galvanometer

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