Pl differentiate between pitch and least count of a vernier caliper.

Solution:

The smallest measurement on the main scale is called pitch whereas the smallest measurement an instrument (vernier caliper) can correctly measure is the least count.

Pitch is given by,

$\text{Pitch}=\frac{\text{Unit of main scale}}{\text{Number of divisions in the unit}}$

Least count of vernier caliper,

$$\begin{gathered} \text{LC}=\frac{\text{Smallest reading on main scale}}{\text{Number of divisions on Vernier scale}} \\ \Rightarrow \text{LC}=\frac{\text{Pitch}}{\text{Number of divisions on Vernier scale}} \end{gathered}$$