| Shown in the figure is a meter-bridge set up with null deflection in the galvanometer. The value of the unknown resistor R is [AIEEE 2008] |
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A) 110 \[\Omega \]
B) 55 \[\Omega \]
C) 13.75 \[\Omega \]
D) 220 \[\Omega \]
Correct Answer: D
Solution :
[d] For balanced meter bridge (null deflection) \[\frac{55}{R}=\frac{20}{80}\]
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