Physics (AS & A Level) · Oct / Nov 2019 · Paper 11 · Question 4

A student intends to measure accurately the diameter of a wire (known to be approximately 1 mm) and the internal diameter of a pipe (known to be approximately 2 cm). What are the most appropriate instruments for the student to use to make these measurements?

1. Awire: calipers; pipe: calipers
2. Bwire: calipers; pipe: micrometer
3. Cwire: micrometer; pipe: calipers
4. Dwire: micrometer; pipe: micrometer

As printed in the paper