Question

The potential difference $(V_A-V_B)$ between the points A and B in the given figure is.

• A. + 9 V
• B. -3 V
• C. +3 V
• D. +6 V

Answer 1

The correct option is A + 9 V

Given : $I=2$ A

Using Kirchhoff's law $V_A-I\left(2\right)-3-I\left(1\right)-V_B=0$

$\therefore$ $V_A-2\times 2-3-2\times 1-V_B=0$

OR $V_A-9-V_B=0$

$⟹V_A-V_B=+9$ V