JEE Advanced 2010 Physics question

A Vernier calipers has 1 mm marks on the main scale. It has 20 equal divisions on the Vernier scale which match with 16 main scale divisions. For this Vernier calipers, the least count is

(A)0.02 mm
(B)0.05 mm
(C)0.1 mm
(D)0.2 mmCorrect

Answer: (D)

Solution

20 Vernier divisions = 16 main scale divisions = 16 mm, so 1 VSD mm. Least count = 1 MSD − 1 VSD mm,

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Question ID VK-025856