Question

A vernier callipers has its main scale graduated in mm and 10 divisions on its vernier scale

are equal in length to 9 mm. When the two jaws are in contact, the zero of the vernier scale

is ahead of the zero of the main scale and the 3rd division of the Vernier scale coincides

with a main scale division.

Find: (i) The least count and

(ii) The zero error of the vernier callipers.






No Prank Please .
Total points 25​

Answer 1

Answer:Value of one main scale division is 1 mm

10 div of vernier scale =9 mm.

1 div of vernier scale =9/10 mm.

Least count =L.C.= Value of one main scale division – Value of one vernier scale division

L.C=  1−  

10

9

​  

=1 mm−0.9 mm=0.1 mm=0.01 cm

Explanation: