Digital Vs Analog Measurement
Digital instruments reduce observational error mainly by:
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Final result usually reported as X ± ΔX where ΔX denotes:
Final result usually reported as X ± ΔX where ΔX denotes:
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Standard deviation of repeated measurements quantifies:
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Oscilloscope time base calibration error affects:
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Random errors can be reduced primarily by:
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Number 0.00560 has significant figures:
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Least count of measuring instrument refers to:
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Systematic errors differ from random errors because they:
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Parallax error in reading scale minimized by:
For product Q = A B, relative error approximates:
For product Q = A B, relative error approximates:
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When adding two measured quantities (with absolute errors ΔA, ΔB), resultant absolute error is:
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About This Question
- Subject
- physics
- Chapter
- experimental skills and error analysis
- Topic
- digital vs analog measurement
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
Displaying direct numerical value
Analog instruments require the observer to estimate the position of a needle between marks (interpolation) and are subject to parallax.
- Digital instruments perform internal A/D conversion and show a discrete number.
- This removes personal 'bias' and 'reading errors' from the observer, although the inherent electronic error of the device still exists.
This hard difficulty physics question is from the chapter experimental skills and error analysis, covering the topic of digital vs analog measurement. It appeared in the 2025 exam.
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