A-LevelPhysicsPhysical quantities and unitsOct/Nov 2019Paper 1 Q41 Mark
A micrometer is used to measure the 28.50 mm width of a plastic ruler. The micrometer reads to the nearest 0.01 mm. What is the correct way to record this reading?
A0.02850 ± 0.01 m
B0.0285 ± 0.001 m
C(2.850 ± 0.001) × 10⁻² m
D(2.850 ± 0.001) × 10³ m
✓ 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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