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In the arrangement shown in the given 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,


 
the deflection in the galvanometer remains zero throughout
there is a momentary deflection in the galvanometer, but it dies out shortly and there is no effect when the key is removed
there are momentary galvanometer deflections that die out shortly; the deflections are in the same direction
there are momentary galvanometer deflections that die out shortly; the deflections are in opposite directions

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Do the non conducting core in solenoid will produce current??