Question

A galvanometer has a resistance 50 $\Omega$ and is shunted by a 0.5 $\Omega$ resistor. The fraction of themain current that flows through the galvanometer is

• A. 1/100
• B. 1/101
• C. 1/10
• D. 1/11

Answer 1

The correct option is B 1/101

$Req=\frac{50\times 0.5}{50+0.5}$

Let total current be i

Part of current flowing is i1

$i^1\left(50\right)=i\frac{(50\times 0.5)}{50+0.5}$

$i=\frac{i}{10I}$

$\therefore \frac{1}{101}partofcurrentflowsthroughthegalvanometer$