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A vernier calliper has 20 divisions on the vernier scale which coincide with 19 divisions on the main scale. The least count of the instrument is 0 . 1 mm . The length of one main scale division is

Options

  1. A0.5   mm
  2. B1   mm
  3. C2 mm
  4. D0.25   mm

Correct answer

C. 2 mm

Step-by-step solution

20 division on vernier scale = 19 division on the main scale 20 VRS = 19 MSR L.C = MSR - VSR = 0.1 mm ⇒ MSR - 19 20 MSR = 0.1 mm ⇒ MSR = 2 mm

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