Question

Find out the potential difference (in volt) between points $A$ and $B$, as shown in the figure

Answer 1

Answer: 3.50

$E_{eq}=\frac{\frac{E_1}{r_1}+\frac{E_2}{r_2}}{\frac{1}{r_1}+\frac{1}{r_2}}$
$\Rightarrow E_{\text{eq }}=\frac{\frac{5}{3}+\frac{2}{3}}{\frac{1}{3}+\frac{1}{3}}=3.5V$