STANDARDPhysics-Current Electricity
STANDARD Physics Meter Bridge MCQ Question
Type: MCQ-numerical-Medium-Class 12
What is the value of unknown resistance R, if galvanometer shows null deflection in the given meter bridge set up?
A
97.50 Ω
B
105 Ω
C
150 Ω
D
110 Ω
Correct Answer
Option A
Detailed Explanation
For null deflection, R₁/R₂ = l/(100-l). Given R₁ = 65 Ω and l = 40 cm, solve for R to get 97.5 Ω.
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