alleryIn a meter bridge experiment, the null point divides the wire as 30 cm and 70 cm. If known resistance is 6 Ω, the unknown is:
A2.57 Ω
B6 Ω
C18 Ω
D14 Ω
Answer & Solution
Correct answer: D. 14 Ω
**Meter bridge ratio:** R_unknown / R_known = (100 - l)/l where l = 30 cm.
**So R_unknown = 6 × (70/30) = 6 × 7/3 = 14 Ω.**
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