Q. The ammeter $A$ reads $2\ A$ and the voltmeter $V$ reads $20\ V.$ The value of resistance $R$ is (Assuming finite resistance’s of ammeter and voltmeter)
A) Exactly $10\ ohm$
B) Less than $10\ ohm$
C) More than $10\ ohm$
D) We cannot definitely say
Explanation
(c) $2R > 20 \Rightarrow R > 10\Omega$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.