Question

Find the potential difference between points P and Q in the circuit as shown in above figure.

• A. 11 V
• B. 10 V
• C. 20 V
• D. 9 V

Answer 1

The correct option is A 11 V

Consider a anti-clockwise current loop with current I. Using Kirchhoff's law,

$20-8=3I+I$ or $I=3A$

For top branch , $V_P-20-3(-3)=V_Q$ or $V_P-V_Q=11V$