The percentage error in the reading of the voltmeter in the figure shown here is nearly ............ $\%$
A$14$
B$28$
C$7$
D$0.71$
Medium
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A$14$
a $\%$ error $=\frac{V-V^{\prime}}{V}=\frac{2-\frac{12}{7}}{2} \times 100 \Rightarrow 14 \%$
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