Error Analysis
Length of a rod measured with meter scale (least count 1 mm) is 52.6 cm. Absolute uncertainty (±) you quote is:
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About This Question
- Subject
- physics
- Chapter
- physics and measurement
- Topic
- error analysis
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
±0.05 cm
The least count of the measuring instrument represents the smallest reliable measurement it can make.
- Least count = 1 mm=0.1 cm.
- The maximum absolute error (uncertainty) in a single measurement is generally taken as half of the least count (or sometimes the full least count depending on convention, but in physics problems, half the LC is standard for identifying discrete scale intervals).
- Uncertainty = ±0.1 cm/2=±0.05 cm.
This easy difficulty physics question is from the chapter physics and measurement, covering the topic of error analysis. It appeared in the 2025 exam.
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