In a metre bridge, a 2 Ω resistance is in the left gap and an unknown resistance \(X\) in the right gap. The null point is at 40 cm from the left end. Then \(X\) is
A. 5 Ω
B. 4.5 Ω
C. 1.33 Ω
D. 3 Ω
1 answer
Best answer
Answer: D. 3 Ω
\(\frac{2}{X}=\frac{40}{60}\Rightarrow X=3\ \Omega\).
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· 23 Oct 2026
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