The Vernier Caliper is a precision measuring instrument used in Physics lab practicals to measure length accurately up to 0.01 mm.
Formula: LC = 1 MSD โ 1 VSD.
Standard LC: 0.1 mm (for 10-division vernier).
Total Reading: MSR + (VSD ร LC).
Least Count (LC) = 1 MSD โ 1 VSD
Where:
Standard Value: For a typical Vernier caliper:
For a more precise caliper (50 divisions):
Most commonly asked in exams: LC = 0.01 mm = 0.1 cm
Total Reading = Main Scale Reading + (Vernier Scale Division ร Least Count)
Example: MSR = 2.3 cm, VSD coinciding = 4, LC = 0.01 cm โ Reading = 2.3 + (4 ร 0.01) = 2.34 cm
Least Count = 1 MSD โ 1 VSD. For a standard Vernier caliper with 10 divisions, the least count is 0.1 mm (0.01 cm).
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