Question
In given circuit find potential difference between $P$ and $Q$ .................. $V$

Answer

a
$\mathrm{I}=\frac{3}{3}=1 \mathrm{\,A},$ from kirchoff's rule

$\mathrm{V}_{\mathrm{P}}+1-1=\mathrm{V}_{\mathrm{Q}}$

$\mathrm{V}_{\mathrm{P}}-\mathrm{V}_{\mathrm{Q}}=0$

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