Question

explain this please i will mark it​

Answer 1

Answer:

Explanation:

A vernier caliper has 20 divisions on the vernier scale, which coincide with 19 on the main scale. If one main scale division is 2mm, then the least count of the instrument is

VSD - Vernier scale divisions.   MSD - Main scale divisions.  

Given that 20 VSD = 19 MSD

Then 1 VSD = (19)/(20) MSD= 0.95 MSD.

Least count of Vernier calipers, LC  = 1 MSD -1 VSD

           = 1 MSD - 0.95 MSD = 0.05 MSD.

As 1 MSD = 2mm,  

Least count, LC = 0.05 x 2 mm = 0.1 mm.