Question

The smallest division on main scale of a vernier caplliers is `1 mm and 10` vernier divisions coincide with `9` main scale divisions. While measuring the length of a line, the zero mark of the vernier scale lies between `10.2 cm and 10.3 cm` and the third division of vernier scale coincides with a main scale division.
(a) Determine the least count of the callopers.
(b) Find the length of the line.

Answer 1

(a) Least Count(LC) `= ("Smallest division on main scale")/("Number of divisions on vernier scale")`
`=(1)/(10) mm=0.1mm=0.01cm`
(b) `L= N + n(LC)=(10.2+3xx 0.01)cm=10.23cm`.