Physics - Current Electricity Question with Solution | TestHub

If the electric potential at point $a$ is $V_a$ and the electric potential at point $b$ is $V_b$ then
$V_b-V_a=\frac{\frac{2}{2}+\frac{4}{2}+\frac{4}{2}}{\frac{1}{2}+\frac{1}{2}+\frac{1}{2}}$
$V_b-V_a=\frac{1+2+2}{\frac{3}{2}}=\frac{10}{3}$

$\therefore V_b-V_a=3.3 \mathrm{V}$