In the given figure, potential difference between $A$ and $B$ is

• A

  0
• B

  5 V
• Correct answer
  C

  10 V
• D

  15 V

Solution

Equivalent resistance, $R=10+\frac{10}{2}=15 \mathrm{k} \Omega$ $\therefore \quad$ Current, $I=\frac{V}{R}=\frac{30}{15 \times 10^3}=2 \times 10^{-3} \mathrm{~A}$ Hence potential difference between A and B, $V=\left(\frac{2 \times 10^{-3}}{2}\right) \times 10 \times 10^3=10 \mathrm{~V}$

Hence, the correct answer is option: 'C'.