Question

The main scale of an instrument has 10 divisions in lcm and 9 divisions of the main scale
coincide with 10 divisions of Vernier. What is the least count of the instrument?​

Answer 1

Answer:

Step-by-step explanation:

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