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The main scale of a vernier calliper reads 10 mm in 10 divisions. 10 divisions of vernier scale coincide with 9 divisions of the main scale. When the two jaws of the callipers touch each other, the fifth division of the vernier coincides with a main scale division and the zero of the vernier is to the right of zero of the main scale. When a cylinder is tightly placed between the two jaws, the zero of vernier scale li

Options

  1. A3.19   cm
  2. B3.14   cm
  3. C3.04   cm
  4. Dnone of these

Correct answer

A. 3.19   cm

Step-by-step solution

Zero error = 0.5 mm = 0.05 cm observed reading of cylinder = 3.2 cm + (4) (0.01 cm) = 3.24 cm actual thickness of cylinder = (3.24) – (0.05) = 3.19 cm.

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