Question

What is the least count of a vernier caliper?

Answer 1

Determine the least count of a vernier caliper.

The smallest measurement that an instrument can take correctly is its least count.
$$\begin{gathered} \text{Least Vernier caliper count}=\frac{\text{Smallest division on main scale}}{\text{Number of divisions on Vernier scale}} \\ \Rightarrow =\frac{1mm}{10divisions} \\ \Rightarrow =0.1mm \end{gathered}$$
Hence, the Vernier caliper least counts formula is derived by dividing the smallest reading of the main scale by the total number of divisions of the vernier scale.