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. Thus, the galvanometer shows momentary deflections in opposite directions. [NCERT Exemplar]
Answer:D
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. Thus, the galvanometer shows momentary deflections in opposite directions. [NCERT Exemplar]