Physics 9702 · AS & A Level · Errors and uncertainties

Errors and uncertainties — practice question

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

  • A$1.90\ \text{mm}$
  • B$2.45\ \text{mm}$
  • C$2.59\ \text{mm}$
  • D$2.73\ \text{mm}$

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