A-LevelPhysicsPhysical quantities and unitsFeb/Mar 2025Paper 1 Q121 Mark
A student takes measurements to calculate the density of a liquid in a beaker. The height of the liquid in the beaker is 0.20 m ± 2%. The internal diameter of the beaker is 0.05 m ± 3%. The mass of the liquid is 0.36 kg ± 10%. What is the percentage uncertainty in the calculated density of the liquid?
A2%
B5%
C15%
D18%
✓ 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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