A vernier calipers having `1` main scale division `= 0.1 cm` to have a least count of `0.02 cm`.If `n` be the number of divisions on vernier scale and `m` be the length of vernier scale, then.

Options

A. n=10m,=0.5cm
B. n=9,m=0.4cm
C. n=10,m=0.8cm
D. n=10,m=0.2cm

Answer

C

Explanation

L.C`=1MSD-1VSD`
`:.0.02=0.1-m/nimpliesm/n=0.08cm`