If only 2% of the main current is to be passed through a gal... | Physics | SolveeIt | Solveeit

Today, August 18

Question

If only 2% of the main current is to be passed through a galvanometer of resistance G, the resistance of shunt should be

A

$\frac{G}{50}$

B

$\frac{G}{49}$

C

$50 \, G$

D

$49 \, G$

Answer

$\frac{G}{49}$

Explanation

Solution

Here, $I_g = \left(\frac{S}{S+G} \right) I$
or $\left( \frac{2}{100} \right) I = \left( \frac{S}{S+G} \right) I$
or $S = \frac{G}{49}$