A-LevelPhysicsPhysical quantities and unitsMay/June 2015Paper 1 Q61 Mark
A single sheet of aluminium foil is folded twice to produce a stack of four sheets. The total thickness of the stack of sheets is measured to be (0.80 ± 0.02)mm. This measurement is made using a digital caliper with a zero error of (–0.20 ± 0.02) mm. What is the percentage uncertainty in the calculated thickness of a single sheet?
A1.0%
B2.0%
C4.0%
D6.7%
✓ Correct Answer
The correct answer is C. 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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