10th division on vernier scale coincidence with 9th division of the main scale 1cm is divided into 20 equal parts . calculate least count
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Answer:
least count is 0.05 mm
Explanation:
1 MSD = 1cm/20 = 10mm/20 =0.5 mm
10 VSD = 9 MSD
1 VSD = 9/10 MSD
L.C = 1 MSD - 1 VSD
= 1 MSD - 9/10 MSD
= (1 - 9/10) MSD
= 1/10 MSD
= 0.5/10
= 0.05 mm
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