A network of four resistances is connected to $9\,V$ battery, as shown in figure. The magnitude of voltage difference between the points $A$ and $B$ is .......... $V.$
JEE MAIN 2023, Medium
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In the circuit $I=\frac{9}{3}=3 A$
$V_C-V_A=2 \times 1.5=3$
$V_C-V_B=4 \times 1.5=6 \ldots \ldots$
$Eq ^{ n }( II )- Eq ^{ n }( I )$
$V _{ A }- V _{ B }=6-3=3 \text { Volt }$
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