Question 627: 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: