Measurement and Experimentation – Notes

Least Count Of A Measuring Instrument

All measurable quantities are physical quantities, such as length , mass, time, current and temperature.

The smallest measurement that can be made with a device or an instrument is called the least count.

Vernier Callipers

A vernier callipers is used to measure the length or thickness of an object with great accuracy.

The principle of the vernier callipers: N V.S.D. = (N-1)M.S.D

The least count also called the vernier constant= 1 M.S.D.-1V.