Vernier Caliper
In a vernier caliper, 1 cm on the main scale is divided into 20 equal parts. If 25 divisions on the vernier scale coincide with 24 divisions on the main scale, what is the least count?
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About This Question
- Subject
- physics
- Chapter
- units and measurements
- Topic
- vernier caliper
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
0.002 cm
- Main Scale Division (1MSD): 1 cm is divided into 20 parts.
- 1MSD=1/20=0.05 cm.
- Vernier Scale Division (1VSD): 25VSD=24MSD.
- 1VSD=(24/25)MSD.
- Least Count Formula: LC=1MSD−1VSD.
- Calculation:
- LC=1MSD−(24/25)MSD=(1/25)MSD.
- LC=0.05/25.
- Result: LC=0.002 cm.
This hard difficulty physics question is from the chapter units and measurements, covering the topic of vernier caliper. It appeared in the 2025 exam.
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