In the experiment to determine the galvanometer resistance by half-deflection method, the plot of $1/ θ$ vs the resistance $(R)$ of the resistance box is shown in the figure. The figure of merit of the galvanometer is _____ $\times 1 0^{- 1} A /$ division. [The source has emf 2V]

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​ i = K θ G + R 2 ​ = K θ ⇒ θ 1 ​ = 2 ( G + R ) K ​ = R ( 2 K ​ ) + 2 K G ​ Slope = 2 K ​ = 4 1 ​ ⇒ K = 0.5 = 5 × 1 0 − 1 A ​ ​

Physics - Current Electricity Question with Solution | TestHub

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