Question

In figure for vernier callipers, calculate the length recorded.

Answer 1

Main scale divisions of vernier callipers in one centimetre = 10

Pitch = `"Unit of main scale"/"Number of divisions in the unit"`

= `1/10` cm = 0.1 cm

Least count (L.C.) = `"Pitch"/"No. of divisions on the vernier scale"`

L.C. = `0.1/10` cm = 0.01 cm

Here main scale reading = 7.3 cm
Vernier scale reading (V.S.D.) coinciding with main scale = 5th
Length recorded = Main scale reading + L.C. × V.S.D.
= 7.3 + 0.01 × 5
= 7.3 + 0.05
= 7.35 cm