Q. The reading of the ideal voltmeter in the adjoining diagram will be
A) $4\ V$
B) $8\ V$
C) $12\ V$
D) $14\ V$
Explanation
(b) Current flowing in the circuit $i = \frac{E}{R} = \frac{10 - 4}{20 + 10} = \frac{1}{5}A$
P.D. across $AC = \frac{1}{5} \times 20 = 4V$
P.D. across $AN = 4 + 4 = 8V$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.