A ball is given whose diameter is to be measured. Ten divisions of vernier scale are found to coincide with 9 main scale divisions. The main scale reading comes out to be 35 mm. 5th division on vernier scale coincides with the main scale. If one main scale division is 1 mm, find the diameter of the ball​

Answers (1)
S safeer

\\L.C=1MSD-1VSD\\\\given\ 9MSD=10VSD\\1VSD=9MSD/10

The least count 

\\L.C=1MSD-\frac{9}{10}MSD=\frac{1}{10}\times1mm=0.1mm

\text{total reading}=MSD+L.C\times VSD=35+0.1\times5=35.5mm=3.55cm

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