Question

In a vernier callipers, length of 10 main scale division is 2 mm. if 20 vernier scale divisions coincide with 18 main scale divisions then the least count of the instrument is

Answer 1

Vernier caliper is an instrument used to measure the internal and external diameters of small tubes.

The least count is the finest measurement you can take with the help of that vernier calipers.

So least count= 1 MSD-1VSD

Here 10 vsd=9 msd

1 vsd=.9 msd

From above LC= 1MSD-1VSD

LC=1MSD-.9MSD=.1MSD(which is equal to .1 mm).

Least count =.1 mm

Answer 2

Answer:

0.02mm is correct answer