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MCQ
A vernier calliper has 10 vernier divisions equal to 9 main scale divisions, each of 1 mm. Its least count is:
Unit-1 Physical Quantities and Measurement
A 0.1 mm
B 0.01 mm
C 0.9 mm
D 1 mm
Explanation

Least count = 1 MSD - 1 VSD = 1 mm - 0.9 mm = 0.1 mm.

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