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 i $s ______$ × 10⁻¹ A/division. [The source has emf 2V]

Question

G1 Physics · Accepted Answer

Image For the galvanometer: i = Kθ Using the half-deflection relation, the source obtains: 1/θ = (K/2)R + constant Therefore, slope of the graph is: Slope = K/2 From the graph: Slope = (2 - 1/2)/(6 - 0) = 1.5/6 = 0.25 Hence: K/2 = 0.25 K = 0.5 A/division = 5 × 10⁻¹ A/division Therefore, answer = 5.

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 i s ______ × 10⁻¹ A/division. [The source has emf 2V]