Question

What is the difference between the main scale and the vernier scale?

Answer 1

Difference between the main scale and the vernier scale:

Main Scale	Vernier Scale
MSD main scale division $9\times 1\mathrm{MSD}$ = $9\mathrm{mm}$	vernier scale division $10\times 1\mathrm{VSD}$= $9\mathrm{mm}$
2. Main scale is divided into millimetres on the vernier caliper.	2. Generally each division on the Vernier scale is $0.1mm$ shorter than the divisions on the main scale, at $0.9mm$ each.
3. One main scale division equals one millimetres.	3. One division of the Vernier scale equals $0.9mm$.
4.	4.