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Question: Answered & Verified by Expert
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 $S$ connected to the galvanometer is
PhysicsCurrent ElectricityTS EAMCETTS EAMCET 2008
Options:
  • A $19 G$
  • B $\frac{G}{19}$
  • C $20 G$
  • D $\frac{G}{20}$
Solution:
2543 Upvotes Verified Answer
The correct answer is: $\frac{G}{19}$
Shunt of an ammeter,
$$
S=\frac{I_g \times G}{I-I_g}
$$
$\begin{aligned} & =\frac{5 \times G}{100-5} \\ & =\frac{G}{19}\end{aligned}$

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