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°, its figure of merit is close to :

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°, its figure of merit is close to : (A) 3 × 10-3 A / div (B) 333° A/div. (C) 6 × 10-3 A/div. (D) 666° A / div.

Tardigrade Admin · Accepted Answer

Figure of Merit = C =( i /θ) = C =(6 × 10-3/2)=3 × 10-3 Am 2

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

$3 \times 1 0^{- 3} A / d i v$

$33 3^{\circ} A / d i v$ .

$6 \times 1 0^{- 3} A / d i v$ .

$66 6^{\circ} A / d i v$ .

Figure of Merit $= C = \frac{i}{θ}$
$= C = \frac{6 \times 1 0 ^{- 3}}{2} = 3 \times 1 0^{- 3} A m^{2}$

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

3×10−3A/div

333∘A/div.

6×10−3A/div.

666∘A/div.