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Current Electricity question

2023 · Q126
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Current Electricity question

2023 · Q126

NEETPhysicsCurrent ElectricityMCQ+4 / −1

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

NEET 2023 Physics - Current Electricity Question 16 English

  1. A
    50 Ω\OmegaΩ
  2. B
    100 Ω\OmegaΩ
  3. C
    400 Ω\OmegaΩ
  4. D
    200 Ω\OmegaΩ
View written solutionFree

Correct answer: B

For no reading galvanometer. Potential across it is same.

NEET 2023 Physics - Current Electricity Question 16 English Explanation

$$\mathrm{i}_{400 \Omega} \Rightarrow \frac{10-2}{400}=\frac{8}{400}=\frac{1}{50}=\mathrm{i}_{\mathrm{R}}$$

$$\mathrm{i}_{\mathrm{R}} \Rightarrow \frac{\mathrm{V}_{\mathrm{R}}}{\mathrm{R}} \Rightarrow \frac{2}{\mathrm{R}}=\frac{1}{50} \Rightarrow \mathrm{R}=100 \Omega$$

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