Topic: Metrology
The least count of a metric Vernier caliper having 25 divisions on Vernier scale, matching with 24 divisions of main scale (1 main scale divisions = 0.5mm) is
- A. 0.005 mm
- B. 0.01 mm
- C. 0.02 mm
- D. 0.005 mm
Answer: C. 0.02 mm
Explanation: Least Count = length of smallest main scale division / Number of divisions on the vernier scale = 0.5 / 25 = 0.02 mm.