MCQ
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$9 \Omega$
- C$6 \Omega$
- D$42 \Omega$
✓
Answer
In case of balanced Wheatstone Bridge
$\frac{V_{A B}}{V_{A D}}=\frac{V_{B C}}{V_{C D}} $
$\Rightarrow \frac{12}{6+x}=\frac{0.5}{0.5}$
$x=6 \Omega$
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