Practical No. 01: Measurements of dimensions of given object by Vernier caliper.

 Practical No. 01: Measurements of dimensions of given object by Vernier caliper.

• The Vernier caliper is a precise instrument for measuring linear dimensions up to 0.002 cm.
• It is highly recommended to always note the zero error and apply its proper correction for every single reading.

• Answer:
  • The smallest division on the main scale (m) = 0.1 cm
  • The total number of divisions on the Vernier scale (n) = 50

• Answer:
  • Range: The range of the Vernier caliper is 0 to 15 cm.
  • Application 1: Measuring the internal diameter of a pipe, tube, or beaker.
  • Application 2: Measuring the exact depth of a small hole, slot, or recess.

• Answer:
  • Formula:
    Least Count (L.C.) = (Smallest division on main scale) / (Total divisions on Vernier scale)
  • Given Data:
    • Smallest main scale division (m) = 1 mm = 0.1 cm
    • Total Vernier divisions (n) = 20

  • Calculation:
    • L.C. = 0.1 cm / 20
    • L.C. = 0.005 cm (or 0.05 mm)

• Answer:
  • Given Data:
    • Main Scale Reading (MSR) = 7.3 cm
    • Vernier Scale Division (VSD) = 5
    • Least Count (L.C.) = 0.01 cm

  • Step-by-Step Calculation:
    1. Vernier Scale Reading (VSR):
       • VSR = VSD × L.C.
       • VSR = 5 × 0.01 cm = 0.05 cm

    2. Total Reading (Correct Measurement):
       • Total Reading = MSR + VSR
       • Total Reading = 7.3 cm + 0.05 cm = 7.35 cm

  • Conclusion: The correct length of the pencil is 7.35 cm.