Question

a) An ammeter has a range of 0-3 A and there are 30 divisions on the ammeter. Calculate the least count of the ammeter.

b) There are 20 divisions for a voltmeter between 0-0.5 V marks. Calculate the least count of the voltmeter.

Answer 1

a.the least count of ammeter is 3/30=1/10=0.1A
b.the least count of voltmeter is 0.5/20=0.02V.

Answer 2

Hey!

Formula to be remembered:

$Least\ Count = \frac{Value \ of \ one \ main \ scale \ division}{Total \ number \ of \ scale \ divisions}$

So,

A. Least count of ammeter = 3/30 = 0.1 A

B. Least count of voltmeter = 0.5/20 =   0.02 V

Hope It Helps You!