Question

in voltmeter there are 20 division between 0 mark and 0.5 mark calculate the least count of the voltmeter? I get some 0.04 it is right or wrong

Answer 1

No,u r wrong because 0.5/20 =0.025

Answer 2

There are 20 divisions are given between 0 mark to 0.5v mark .
we know,
Least count of a instrument is the smallest value that can be measured by the given instrument .
e.g., Least count = gap between two marks { range}/number of divisions
= (0.5 - 0)v/20 = 0.5/20 = 0.025v

Hence, least count of the voltmeter is 0.025v