O-LevelPhysicsMeasurement5054/11 · May/June 2015 · Q21 Mark

The diameter and the length of a thin wire, approximately 50 cm in length, are measured as precisely as possible. What are the best instruments to use?

Amicrometer rule

Bmicrometer vernier calipers

Crule tape

Dvernier calipers rule

✓ Correct answer

A: micrometer rule

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Topic: Measurement, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2015 Paper 1 Variant 1, question 2.

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