Question

If resistance of galvanometer is 100 W and deflection occurs in it when connected in circuit is of 20 divisions. Then calculate figure of merit of galvanometer –

• A. 5 × 10^–2 A/div
• B. 2 × 10^–4 A/div
• C. 2 × 10^–2 A/div
• D. 5 × 10^–4 A/div

Answer 1

Answer: (A)

5 × 10^–2 A/div

Answer 2

i = $\frac{2}{100 + 100} = .01A$, i = kq

\ k = i/q = .01/20 = 5 × 10^–4 A/ div.