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Physics (AS & A Level) · May / June 2021 · Paper 13 · Question 5

9702Errors and uncertainties

The diameter of a circular disc is measured as (7.0 ± 0.1) mm. What is the area of the disc and the absolute uncertainty in the area?

  1. A38.5, ±0.5
  2. B38, ±1
  3. C154, ±2
  4. D154, ±4

As printed in the paper

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Correct answer: B. 38, ±1

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