The galvanometer deflection when key K 1 is closed but K 2 is open, equals θ 0 (see figure). On closing K 2 also and adjusting R 2 to 5 Ω Ω , the deflection in galvanometer becomes 
. The resistance of the galvanometer is, then, given by [Neglect the internal resistance of battery]:
Text Solution
Verified by ExpertsThe correct answer is:
D
… .(i)
… .(ii)
Solving above two equations 
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