Least Count (vernier Caliper)
Mediumphysics
A vernier caliper has 10 vernier divisions coinciding with 9 main scale divisions (1 MSD = 1 mm). What is least count?
Select the correct option:
Solution
Incorrect! Answer:
0.1 mm
- Least Count (LC) Formula: LC=1 MSD−1 VSD, where MSD is Main Scale Division and VSD is Vernier Scale Division.
- Information Given: 1 MSD=1 mm. 10 VSD=9 MSD.
- Calculation of 1 VSD:
- 1 VSD=109 MSD=0.9 mm.
- Substitute into LC:
- LC=1 mm−0.9 mm=0.1 mm.
- Result: The instrument's least count is 0.1 mm.
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About This Question
- Subject
- physics
- Chapter
- physics and measurement
- Topic
- least count (vernier caliper)
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
0.1 mm
- Least Count (LC) Formula: LC=1 MSD−1 VSD, where MSD is Main Scale Division and VSD is Vernier Scale Division.
- Information Given: 1 MSD=1 mm. 10 VSD=9 MSD.
- Calculation of 1 VSD:
- 1 VSD=109 MSD=0.9 mm.
- Substitute into LC:
- LC=1 mm−0.9 mm=0.1 mm.
- Result: The instrument's least count is 0.1 mm.
This medium difficulty physics question is from the chapter physics and measurement, covering the topic of least count (vernier caliper). It appeared in the 2025 exam.
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