Question

1.There are 10 divisions on a Vernier which coincide with 9 divisions on the main scale and one cm on the main scale is divided into 10 parts . Find the least count of the Vernier. In a certain observation, the zero of the Vernier lies between 1.8 cm and 1.9 cm on the main scale. The 5th division on the Vernier coincides with a division of the main scale. Find the length.

Answer 1

Explanation:

The least count is 0.01cm.

Main scale reading = 1.8cm

Vernier scale division = 4(corresponds with main scale division)

Vernier scale reading = Vernier scale division×Least count

= 4×0.01

= 0.04cm

total reading = main scale reading+vernier scale reading

= 1.8+0.04

= 1.84cm