Physics - Current Electricity Question with Solution | TestHub

The current through each circuit element is $2 \mathrm{A}$, so

$$\begin{gathered} V_{\mathrm{A}}-\left(2\times 6\right)-12-\left(2\times 9\right)+4-\left(2\times 5\right)=V_{\mathrm{B}} \\ \Rightarrow V_{\mathrm{A}}-V_{\mathrm{B}}=48 \mathrm{V} \end{gathered}$$