A) 0.2 %
B) 2 %
C) 1 %
D) 0.1 %
Correct Answer: A
Solution :
\[R\propto {{l}^{2}}\] \[\Rightarrow \] \[\frac{\Delta R}{R}=\frac{2\Delta l}{l}\] \[\Rightarrow \] \[\frac{\Delta {{R}_{0}}}{R}%=2\times 0.1=0.2%\]
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