Question

The following information is given in respect of a vernier calliper.
1 main scale division = 0.3 cm
30 V.S.D = 29 M.S.D
The least count of this vernier calliper is ___.

• A. 0.01 mm
• B. 0.1 cm
• C. 0.03 cm
• D. 0.1 mm

Answer 1

The correct option is D 0.1 mm

1 M.S.D = 0.3 cm
Since, 30 V.S.D = 29 M.S.D
(i.e., n V.S.D = (n - 1) M.S.D)
Least count $=\frac{1M.S.D}{30}=\frac{0.3cm}{30}=0.01cm=0.1mm$