Question

Find the least count of a milliammeter in which there are 20 divisions between 400 mA and 500 mA marks.

Answer 1

Given number of divisions = 20 divisions and range = 500 - 400 = 100.
We know, $leastcount=\frac{Range}{Numberofdivision}$
$=\frac{100}{20}=5$