In the figure shown the power generated in $y$ is maximum when $y = 5\,\Omega $. Then $R$ is
A$y = 2\,\Omega $
B$y = 6\,\Omega $
C$y = 5\,\Omega $
D$y = 3\,\Omega $
Medium
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D$y = 3\,\Omega $
d $\mathrm{R}+2=\mathrm{y}$
$\Rightarrow R+2=5$
$\Rightarrow \mathrm{R}=3\, \Omega$
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