A-LevelPhysicsPhysical quantities and units9702/12 · Oct/Nov 2024 · Q31 Mark

A solid bar has a square cross-section. Its length is measured as 50.0±0.2cm and its width is measured as 2.00±0.01 cm. These values are used to calculate the volume of the bar. What is the percentage uncertainty in the calculated volume?

A±0.21%

B±0.22%

C±0.90%

D±1.4%

✓ Correct answer

D: ±1.4%

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Topic: Physical quantities and units, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2024 Paper 1 Variant 2, question 3.

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