Physics 9702 · AS & A Level · Errors and uncertainties

Errors and uncertainties — practice question

A micrometer screw gauge is employed to find the diameter of a wire. When the jaws are shut, the micrometer gives a reading of $(-0.05 \pm 0.02)\,\text{mm}$. With the wire placed between the two jaws, the reading becomes $(+1.03 \pm 0.02)\,\text{mm}$. Determine the diameter of the wire.

  • A$(0.98 \pm 0.02)\,\text{mm}$
  • B$(1.08 \pm 0.02)\,\text{mm}$
  • C$(0.98 \pm 0.04)\,\text{mm}$
  • D$(1.08 \pm 0.04)\,\text{mm}$

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