Question

In a voltmeter there are 20 divisions between 0 and 0.5 V mark,calculate it's least count.

Answer 1

The 20 division between 0 and 0.5V Answer is 0.025V

Answer 2

Least count is the least value that can be measured using a measuring device. It is calculated by dividing the total value measured in ‘n’ number of divisions by the total number of divisions,i.e., ‘n’.

Least Count (LC) = Value of ‘n’ divisions/n

Given that the voltmeter measures 0.5V in 20 divisions

=> Value = 0.5 V

n = 20

LC = 0.5/20 = 0.025 V = 25mV

Thus, the least count of voltmeter is 25mV.