Least Count of a Vernier Calliper
The least count of vernier Calliper is the smallest measurement that can be made with the instrument. It is calculated by dividing the smallest division on the main scale by the number of divisions on the vernier scale.
The mathematical formula for the Least Count of Vernier Calliper is,
VC = 1 MSD – 1 VSD
If there are n divisions on the Vernier Scale then if they coincide with (n-1) division on the main scale, now the least count of the Vernier Scale is,
LC = (1 – {n-1}/n)MSD
Where,
- VC is Vernier Constant
- MSD is Main Scale Division
- VSD is Vernier Scale Division
- LC is Least Count
For example, if the main scale has divisions of 1 mm and the vernier scale has 25 divisions, then the least count of the vernier Calliper is 0.01 mm.
Vernier Calliper
Vernier Calliper is a precision measuring instrument used to measure the internal and external dimensions of an object. It consists of two main parts:
- A Fixed Jaw
- A Movable Jaw
The fixed jaw is used to measure the outside of an object, while the movable jaw is used to measure the inside of an object. This is a device that is used to measure very smaller values and it can measure the value in the range of 0.1 mm.
In this article, we will learn about Vernier Calliper, its diagram, working, and others in detail.