NEET2014Physics-Electricity
NEET 2014 Physics Meter Bridge MCQ Question
Type: MCQ-numerical-Medium-Class 12
The resistances in the two arms of the metre bridge are 5 Ω and R Ω, respectively. When the resistance R is shunted with an equal resistance, the new balance point is at 1.6 l₁. The resistance R, is
A
10 Ω
B
15 Ω
C
20 Ω
D
25 Ω
Correct Answer
Option C
Detailed Explanation
Using the principle of the meter bridge, the effective resistance of R shunted with an equal resistance is R/2. Solving the balance equation gives R = 20 Ω.
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