Q5. What is pitch and least count of: a. Vernier calipers if the smallest division on the main scale is 1 mm and total divisions on the vernier scale are 20. b. Screw gauge if the smallest division on its main scale is 0.5 mm and its movable scale has 50 divisions.

What is pitch and least count of:

a. Vernier calipers if the smallest division on the main scale is 1 mm and total divisions on the vernier scale are 20.
b. Screw gauge if the smallest division on its main scale is 0.5 mm and its movable scale has 50 divisions.

Ans:

a.

The least count of vernier calipers is given by:
Least Count =  Smallest division on main scale /  Number of divisions on vernier scale
Least Count =  1mm / 20
Least Count =  0.05 mm = 0.005 cm

b.
The least count of screw gauge is given by:
Least Count = Pitch of the screw / Number of divisions on circular scale

Least Count = 0.5 mm / 50

Least Count = 0.01 mm

Least Count = 0.001 cm

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