The potential difference $(V_A - V_B)$ between the points $A$ and $B$ in the given figure is ............ $V$
A$+6$
B$+9$
C$-3$
D$+3$
NEET 2016, Easy
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B$+9$
b $V_{A B}=V_{A}-V_{B}=2 \times 2+3+1 \times 2=9\, \mathrm{V}$
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