A) 4
B) 6
C) 8
D) 12
Correct Answer: B
Solution :
Two resistance are in ratio 1 : 2 and third resistance is R So, \[\frac{1}{x}+\frac{1}{2x}+\frac{1}{R}=1\Rightarrow x=\frac{3}{2}\left( \frac{R}{R-1} \right)\] As, resistance is not fractional Þ \[\frac{R}{R-1}=2\] Þ \[x=3,\,R=2,\,2x=6\] Hence, the value of largest resistance = 6W.You need to login to perform this action.
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