Question

A galvanometer is used in laboratory for detecting the null point in electrical experiments. If, on passing a current of $6\, mA$ it produces a deflection of $2^{\circ}$, its figure of merit is close to :

• A. $3 \times 10^{-3} A / div$
• B. $333^{\circ}\, A/div$.
• C. $6 \times 10^{-3}\, A/div$.
• D. $666^{\circ} A / div$.

Answer 1

Answer: (A)

Figure of Merit $= C =\frac{ i }{\theta}$
$= C =\frac{6 \times 10^{-3}}{2}=3 \times 10^{-3} Am ^{2}$