Question

The length of one main scale division of a given vernier calipers is 1 cm. When the jaws are in contact,
the last division of the vernier scale coincides with 99th mark of the main scale. Then the least count
of the calipers is
(1) 0.01 mm
0.01 cm
(3) 0.1 cm
(4) 0.1 mm​

Answer 1

Explanation:

The smallest division on main scale of a Vernier calipers is 1mm and 10 Vernier scale division coincide with 9 main scale divisions. While measuring the length of a line, the zero mark of the Vernier scale lies between 10 . 2cm and 10 . 3cm and the third division of Vernier scale coincide with a main scale division.