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Physics (AS & A Level) · May / June 2017 · Paper 13 · Question 4

9702Errors and uncertainties

A voltage is carefully measured with a high-quality instrument and found to be 2.321 V. Two students, using two different methods, conclude that the voltage is 2.33 V and 2.344 V respectively. Which statement is correct?

  1. A2.33 V is less accurate and less precise than 2.344 V.
  2. B2.33 V is less accurate and more precise than 2.344 V.
  3. C2.33 V is more accurate and less precise than 2.344 V.
  4. D2.33 V is more accurate and more precise than 2.344 V.

As printed in the paper

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Correct answer: C. 2.33 V is more accurate and less precise than 2.344 V.

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