Fig. 1.1 shows 20 turns of wire wound closely around a pencil, with the length spanning the turns labelled AB. Name the instrument used to measure the length AB.

Model answer

metre rule

Also accepted: ruler, vernier calipers, measuring tape

Explanation

AB is a straight length of a few centimetres, so a metre rule (or vernier calipers/measuring tape) is suitable.

Derived from ZIMSEC Physics Paper 2, November 2021, Q1

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