Question

The potential difference between points $A$ and $B$ is:

• A. $\frac{20}{7} V$
• B. $\frac{40}{7} V$
• C. $\frac{10}{7} V$
• D. zero

Answer 1

Answer: (D)

zero

Answer 2

From the given figure, current through lower branch of resistances which are joined in series is
$i_{1}=\frac{10}{4+3}=\frac{10}{7}$ amp