Practical No. 01: Measurements of dimensions of given object by Vernier caliper.
XIV. Conclusions and Recommendations
- 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.
XV. Practical Related Questions & Answers
Q1. Give the value of smallest division on main scale and the total no. of divisions on Vernier scale of the instrument used in experiment.
- Answer:
- The smallest division on the main scale (m) = 0.1 cm
- The total number of divisions on the Vernier scale (n) = 50
Q2. Write the range of the Vernier caliper used in the experiment. Write two applications of a vernier caliper.
- 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.
Q3. Determine the least count (L.C.) of a Vernier caliper if the smallest division on the main scale is 1 mm and the number of divisions on the Vernier scale is 20.
- 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)
- Formula:
Q4 & 5. A student has used a Vernier caliper with L.C. 0.01 cm, to measure the length of his pencil. He found that the main scale showed a reading of 7.3 cm and the Vernier scale coincides with the 5th position to the main scale. Give the correct measurement of the length of the pencil neglecting zero error.
- 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:
- Vernier Scale Reading (VSR):
- VSR = VSD × L.C.
- VSR = 5 × 0.01 cm = 0.05 cm
- Total Reading (Correct Measurement):
- Total Reading = MSR + VSR
- Total Reading = 7.3 cm + 0.05 cm = 7.35 cm
- Vernier Scale Reading (VSR):
- Conclusion: The correct length of the pencil is 7.35 cm.
- Given Data:
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