A-LevelPhysicsPhysical quantities and unitsOct/Nov 2011Paper 1 Q41 Mark
A micrometer is used to measure the diameters of two cylinders. diameter of first cylinder = 12.78 ± 0.02 mm diameter of second cylinder = 16.24 ± 0.03 mm The difference in the diameters is calculated. What is the uncertainty in this difference?
A±0.01 mm
B±0.02 mm
C±0.03 mm
D±0.05 mm
✓ 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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