Physics 9702 · AS & A Level · Errors and uncertainties

Errors and uncertainties — practice question

A micrometer screw gauge is used to find the diameter of a copper wire. The reading with the wire in place is shown in diagram 1. The wire is then taken out and the micrometer jaws are closed. The updated reading is shown in diagram 2. What is the diameter of the wire?

  • A$1.95\,\text{mm}$
  • B$2.45\,\text{mm}$
  • C$2.59\,\text{mm}$
  • D$2.73\,\text{mm}$

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