Paper 1 · November 2024 · Measurement and Units

Which instrument is used to accurately measure the diameter of a tungsten wire?

Avernier calipers

Bmicrometer screw gauge

Cmetre rule

Dtape measure

Explanation

A tungsten wire is a fraction of a millimetre across, and only the micrometer screw gauge reads to 0.01 mm. Vernier calipers stop at 0.01 cm, and a rule or tape is far coarser.

ZIMSEC Physics 4023/1, November 2024, Q1

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Which instrument is used to accurately measure the diameter of a tungsten wire?

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