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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

Options

  1. A0.02 ~mm
  2. B0.05 ~mm
  3. C0.1 ~mm
  4. D0.2 ~mm

Correct answer

D. 0.2 ~mm

Step-by-step solution

Least count of vernier calipers aligned & LC =1 MSD -1 VSD & = Smallest division on main scale Number of divisions on vernier scale & 20 divisions of vernier scale & =16 divisions of main scale & 1 VSD = 16 20 ~mm =0.8 ~mm & LC =1 MSD -1 VSD & =1 ~mm -0.8 ~mm & =0.2 ~mm & aligned The correct option is (d).

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