Question 211: Current Electricity

Question

A 72 $$\Omega$$ galvanometer is shunted by a resistance of 8 $$\Omega$$. The percentage of the total current which passes through the galvanometer is :

Accepted Answer

From the given setup
$$y 	imes {R_G} = (x - y)({R_S})$$
$$ \Rightarrow y 	imes 72 = (x - y) 	imes 8$$
$$ \Rightarrow 9y = x - y$$
$$ \Rightarrow y = {x \over {10}}$$ or 10% of x

Answer

0.1%

Answer

10%

Answer

25%

Answer

0.25%

Current Electricity

A 72 $\Omega galvanometer is shunted by a resistance of 8 \Omega$. The percentage of the total current which passes through the galvanometer is :

Choose the correct answer: