Q. The relation between voltage sensitivity ($\sigma_{V})$ and current sensitivity $\left( \sigma_{i} \right)$ of a moving coil galvanometer is (resistance of galvanometer is G).
A) $\frac{\sigma_{i}}{G} = \sigma_{v}$
B) $\frac{\sigma_{v}}{G} = \sigma_{i}$
C) $\frac{G}{\sigma_{v}} = \sigma_{i}$
D) $\frac{G}{\sigma_{i}} = \sigma_{V}$
Explanation
(a) $\sigma_{i} = \frac{\theta}{i} = \frac{\theta}{iG}.G = \sigma_{V}G \Longrightarrow \frac{\sigma_{i}}{G} = \sigma_{v}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.