For the network shown below, the value $V _{ B }- V _{ A }$ is_______ $V$
A$9$
B$20$
C$10$
D$30$
JEE MAIN 2022, Medium
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C$10$
c $i =\frac{15}{3}=5 \,A$
$15-5(1)=10 \,Volt$
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