There are 20 divisions in 4 cm of main scale. The vernier scale has 10 divisions. The least count of the instrument is?

Asked by chelshishah10 | 17th Aug, 2020, 09:55: AM

Expert Answer:

There are 20 divisions in 4 cm of main scale
 1 cm of main scale will have 20/4 = 5 divisions
Thus, 
 1MSD  = 1/5 = 0.2 cm 
Vernier scale has 10 divisions 
Least count  = 1 Main scale division/No. of vernier scale divisions
Thus, 
L.C. = 0.2/10 = 0.02 cm 
The least count of the instrument is 0.02 cm 

Answered by Shiwani Sawant | 17th Aug, 2020, 11:02: PM