Question 282 of 380

The value of unknown resistance $(x)$ for which the potential difference between $B$ and $D$ will be zero in the arrangement shown, is :

A$3 \Omega$B$42 \Omega$C$9 \Omega$D$6 \Omega$

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Answer: (D) $6 \Omega$

In case of balanced Wheatstone Bridge
$\begin{aligned}
& \frac{V_{A B}}{V_{A D}}=\frac{V_{B C}}{V_{C D}} \Rightarrow \frac{12}{6+x}=\frac{0.5}{0.5} \\
& x=6 \Omega
\end{aligned}$

JEE Main Physics practice question on Current Electricity (Wheatstone Bridge), with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.