A battery of $emf$ $10\,V$ is connected to resistances as shown in the figure. The potential difference between $A$ and $B,\,\,(V_A -V_B)$ is ................ $V$
Medium
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Current in each branch $=\frac{10}{4}=2.5 \mathrm{\,A}$
$\mathrm{V}_{\mathrm{C}}-\mathrm{V}_{\mathrm{A}}=2.5 \times 1$ ..........$(i)$
$\mathrm{V}_{\mathrm{C}}-\mathrm{V}_{\mathrm{B}}=2.5 \times 3$ ............$(ii)$
eq. $(ii)$ $-$ $(i)$
$V_{A}-V_{B}=2.5(3-1)=5 \mathrm{\,V}$
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