MCQ
Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer. The value of the unknown resistor $R$ is ............. $\Omega$
- A$55$
- B$13.75$
- ✓$220$
- D$110$
✓
Answer
Correct option: C.
$220$
c
According to the condition of balancing
According to the condition of balancing
$\frac{55}{20}=\frac{R}{80} \Rightarrow \mathrm{R}=220 \,\Omega$
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