Question 598: Current Electricity

Question

If the galvanometer $G$ does not show any deflection in the circuit shown, the value of $R$ is given by:

Accepted Answer

For no reading galvanometer. Potential across it is same.
$\mathrm{i}_{400 \Omega} \Rightarrow \frac{10-2}{400}=\frac{8}{400}=\frac{1}{50}=\mathrm{i}_{\mathrm{R}}$
$\mathrm{i}_{\mathrm{R}} \Rightarrow \frac{\mathrm{V}_{\mathrm{R}}}{\mathrm{R}} \Rightarrow \frac{2}{\mathrm{R}}=\frac{1}{50} \Rightarrow \mathrm{R}=100 \Omega$

Answer

50 $\Omega$

Answer

100 $\Omega$

Answer

400 $\Omega$

Answer

200 $\Omega$

Current Electricity

If the galvanometer G does not show any deflection in the circuit shown, the value of R is given by:

Choose the correct answer: