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A vernier calliper has 20 divisions on t...

A vernier calliper has `20` divisions on the vernier scale, which coincide with `19` on the main scale. The least count of the instrument is `0.1`mm. The main scale divisions are of :

A

`0.5`mm

B

`1`mm

C

`2`mm

D

`(1)/(4)` mm

Text Solution

Verified by Experts

The correct Answer is:
C
Here `(0.1)/(10)=(1-(19)/(20))` SD or `(1)/(100)=(1)/(20)xx1` SD
or `1 SD=(1)/(5)cm=(1)/(5)xx10mm=2mm`
Hence `(c )` is correct.
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