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Q. In the part of a circuit shown in figure, the potential difference $\left( V _{ G }- V _{ H }\right)$ between points $G$ and $H$ will be:-Physics Question Image

Solution:

Using KCL current through $1\, \Omega$ is $2\, A$ upwards.
Now $V _{ G }-2 \times 4+3-2 \times 2+2 \times 1= V _{ H }$
$\Rightarrow V _{ G }- V _{ H }=7\, V$