A-LevelPhysicsPhysical quantities and unitsMay/June 2012Paper 1 Q41 Mark
The diameter of a cylindrical metal rod is measured using a micrometer screw gauge. The diagram below shows an enlargement of the scale on the micrometer screw gauge when taking the measurement. [Figure 4.1] What is the cross-sectional area of the rod?
A3.81 mm²
B11.4 mm²
C22.8 mm²
D45.6 mm²
✓ Correct Answer
The correct answer is B. 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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