An observer notes the reading of scale from different angles (parallax) while measuring the length of the wire, what type of error is possible:
Correct answer: D. Random Error
- A. Systematic error
- B. Zero error
- C. Precise error
- D. Random Error
Explanation
Parallax error is due to the positioning of the eye while recording a value. The positioning and the error in the reading birthed from this positioning is completely random since the inaccurate reading could be either greater or lesser than the true value.
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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Measurement errors include random and systematic effects, absolute, fractional and percentage uncertainty, and the precision shown by significant figures. Questions apply rounding rules and uncertainty propagation in addition, subtraction, multiplication and division, while distinguishing accuracy from precision and uncertainty from an actual mistake.
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