A) 1%
B) 0.5%
C) 0.25%
D) 2.5%
Correct Answer: C
Solution :
\[\frac{500\times {{R}_{1}}\times 2}{100}-\frac{500\times {{R}_{2}}\times 2}{100}=2.50\] or \[1000\,({{R}_{1}}-{{R}_{2}})=250\] or \[{{R}_{1}}-{{R}_{2}}=\frac{250}{1000}=\frac{1}{4}=0.25%\]
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