Q. In the circuit shown below, the reading of the voltmeter $V$ is
A) $12\ V$
B) $8\ V$
C) $20\ V$
D) $16\ V$
Explanation
(a) In the following circuit potential difference between
$C$ and $A$ is $V_{C} - V_{A} = 1 \times 4 = 4$ …(i)
$C$ and $B$ is $V_{C} - V_{B} = 1 \times 16 = 16$ …(ii)
On solving equations (i) and (ii) we get
$V_{A} - V_{B} = 12V$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.