A vernier calliper has 1 mm mark on the main scale. It has 20 equal divisions on the vernier scale which match with 16 main scale divisions. For this vernier callipers, the least count is
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a
0.02 mm
b
0.05 mm
c
0.1 mm
d
0.2 mm
answer is D.
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Detailed Solution
Least count of a vernier calliper,LC =1MSD – 1 VSD20 divisions of Vernier scale =16 divisions of main scale1 VSD=1620mm=0.8 mm∴ LC =1MSD–1VSD=1mm–0.8mm= 0.2mm