A-LevelPhysicsPhysical quantities and units9702/12 · May/June 2012 · 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?

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A3.81 mm²

B11.4 mm²

C22.8 mm²

D45.6 mm²

✓ Correct answer

B: 11.4 mm²

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Topic: Physical quantities and units, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2012 Paper 1 Variant 2, question 4.

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