The galvanometer deflection, when key K1 is closed but K2 is open, equals $\theta $0 (see figure). On closing K2 also and adjusting R2 to 5$\Omega $, the deflection in galvanometer becomes ${{{\theta _0}} \over 5}.$ . The resistance of the galvanometer is, then, given by [Neglect the internal resistance of battery] :

Question

The galvanometer deflection, when key K₁ is closed but K₂ is open, equals $\theta $₀ (see figure). On closing K₂ also and adjusting R₂ to 5$\Omega $, the deflection in galvanometer becomes ${{{\theta _0}} \over 5}.$ . The resistance of the galvanometer is, then, given by [Neglect the internal resistance of battery] :

5 $\Omega $

25 $\Omega $

12 $\Omega $

22 $\Omega $

Solution

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