Least Count
A screw gauge has 50 divisions on its circular scale and moves forward by 0.5 mm when the circular scale completes one rotation. What is the least count of the screw gauge?
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About This Question
- Subject
- physics
- Chapter
- units and measurements
- Topic
- least count
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
0.01 mm
- Pitch Definition: The distance moved by the screw per complete rotation of the head.
- Given Pitch =0.5 mm.
- Least Count Formula: LC=Total divisions on circular scalePitch.
- Calculation:
- LC=0.5/50.
- Result: LC=0.01 mm.
- Note: The least count determines the precision of the instrument.
This easy difficulty physics question is from the chapter units and measurements, covering the topic of least count. It appeared in the 2025 exam.
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