O-LevelPhysicsMeasurement5054/11 · May/June 2013 · Q21 Mark

A micrometer is used to measure the diameter of a uniform wire. What is done to obtain an accurate answer?

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AFind the reading and add or subtract the zero error.

BMake the micrometer horizontal.

CSubtract the fixed scale reading from the rotating scale reading.

DSubtract the rotating scale reading from the fixed scale reading.

✓ Correct answer

A: Find the reading and add or subtract the zero error.

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Topic: Measurement, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2013 Paper 1 Variant 1, question 2.

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