Physics 9702 · AS & A Level · Errors and uncertainties

Errors and uncertainties — practice question

A voltage is measured precisely using a reliable instrument and the result is $2.321\,\text{V}$. Two students, working by two different methods, state that the voltage is $2.33\,\text{V}$ and $2.344\,\text{V}$ respectively. Which statement is correct?

  • A$2.33\,\text{V}$ is less accurate and less precise than $2.344\,\text{V}$.
  • B$2.33\,\text{V}$ is less accurate and more precise than $2.344\,\text{V}$.
  • C$2.33\,\text{V}$ is more accurate and less precise than $2.344\,\text{V}$.
  • D$2.33\,\text{V}$ is more accurate and more precise than $2.344\,\text{V}$.

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