Question

In a galvanometer $5$% of the total current in the circuit passes through it. If the resistance of the galvanometer is $G$, the shunt resistance $5$ connected to the galvanometer is:

• A. $19G$
• B. $\frac{G}{19}$
• C. $20G$
• D. $\frac{G}{20}$

Answer 1

Answer: (B)

$\frac{G}{19}$

Shunt of an ammeter,
$S=\frac{I_g\times G}{I-I_g}$
$=\frac{5\times G}{100-5}$
$=\frac{G}{19}$