The resistive network shown below is connected to a $D.C.$ source of $16\, V$. The power consumed by the network is $4\, Watt$. The value of $R$ is ............. $\Omega$
JEE MAIN 2019, Medium
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$P=\frac{16^{2}}{8 R}=4$
$\therefore $ $R=8 \,\Omega$
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