Physics 9702 · AS & A Level · Errors and uncertainties

Errors and uncertainties — practice question

A micrometer is being used to measure the diameters of two cylinders. Diameter of first cylinder $= (12.78 \pm 0.02)\,\text{mm}$. Diameter of second cylinder $= (16.24 \pm 0.03)\,\text{mm}$. The difference between the two diameters is then found. What is the uncertainty in this difference?

  • A$0.01\,\text{mm}$
  • B$0.02\,\text{mm}$
  • C$0.03\,\text{mm}$
  • D$0.05\,\text{mm}$

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