In a voltmeter there are 20 division between 0 and.5

Question

In a voltmeter there are 20 divisions between the 0 mark and 0.5 mark. The least count of the voltmeter is 

(a) 0.020 V

(b) 0.025 V

(c) 0.050 V

(d) 0.250 V

Answer 1

The correct option is (b) 0.025 V.

Explanation:

Least count = gap between two marks (range)/ number of division

= (0.5 - 0)v/20

= 0.5/20

= 0.025 V