A) 1.25
B) 8
C) 10
D) 20
Correct Answer: B
Solution :
\[i\propto \frac{1}{R}\,\Rightarrow \,\frac{{{i}_{1}}}{{{i}_{2}}}=\frac{{{R}_{2}}}{{{R}_{1}}}\] Þ \[\frac{5}{4}=\frac{(R+2)}{R}\]Þ R = 8W
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