Question

For the resistance network shown in the figure, choose the correct option(s)

• A. The current through $PQ$ is zero.
• B. $I _{1}=3 A$
• C. The potential at $S$ is less than that at $Q$.
• D. $I _{2}=2 A$

Answer 1

Answer: (A), (B), (C), (D)

Nodes $P$ and $Q$ are equipotential and nodes $S$
and $T$ are equipotential from wheatstone bridge,
no current passes through $PQ$ and $ST$.
$I_{1}=\frac{12}{4}=3 A $
$I_{2}= I _{1}\left(\frac{12}{6+12}\right)=2 A$