Measuring Instruments (precision)
Easyphysics
Which instrument generally offers highest precision for small lengths?
Select the correct option:
Solution
Incorrect! Answer:
Screw gauge
- Precision comparison: Precision is limited by the instrument's least count (smallest graduation).
- Typical Least Counts:
- Meter Scale: 1 mm (0.1 cm)
- Vernier Caliper: 0.1 mm (0.01 cm)
- Screw Gauge: 0.01 mm (0.001 cm)
- Analysis: The Screw Gauge has the smallest least count, meaning it can distinguish between much smaller variations in length.
- Conclusion: Therefore, it offers the highest precision for measuring thin wires or plates.
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About This Question
- Subject
- physics
- Chapter
- physics and measurement
- Topic
- measuring instruments (precision)
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Screw gauge
- Precision comparison: Precision is limited by the instrument's least count (smallest graduation).
- Typical Least Counts:
- Meter Scale: 1 mm (0.1 cm)
- Vernier Caliper: 0.1 mm (0.01 cm)
- Screw Gauge: 0.01 mm (0.001 cm)
- Analysis: The Screw Gauge has the smallest least count, meaning it can distinguish between much smaller variations in length.
- Conclusion: Therefore, it offers the highest precision for measuring thin wires or plates.
This easy difficulty physics question is from the chapter physics and measurement, covering the topic of measuring instruments (precision). It appeared in the 2025 exam.
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