For what value of unknown resistance $X$, the potential difference between $B$ and $D$ will be zero in the circuit shown in the figure ............... $\Omega$
Medium
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For balanced Wheatstone bridge $\frac{P}{Q} = \frac{R}{S}$
$ \Rightarrow $ $\frac{{12}}{{(1/2)}} = \frac{{x + 6}}{{(1/2)}}$ $ \Rightarrow $ $x = 6\,\Omega $
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