Q. Two galvanometer $A$ and $B$ require $3mA$ and $5mA$ respectively to produce the same deflection of 10 divisions. Then
A) $A$ is more sensitive than $B$
B) $B$ is more sensitive than $A$
C) $A$ and $B$ are equally sensitive
D) Sensitiveness of $B$ is 5/3 times that of $A$
Explanation
(a) Sensitivity $(S) = \frac{\theta}{i} \Rightarrow \frac{S_{A}}{S_{B}} = \frac{i_{B}}{i_{A}} = \frac{5}{3} \Rightarrow S_{A} > S_{B}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.