A-LevelPhysicsPhysical quantities and unitsOct/Nov 2024Paper 1 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
The correct answer is D. This question tests the candidate's understanding of physical quantities and units within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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