Physics 9702 · AS & A Level · Errors and uncertainties

Errors and uncertainties — practice question

A quantity $X$ depends on temperature $\theta$ as shown. $\theta$ is found from the matching values of $X$ by using this graph. $X$ is measured with a percentage uncertainty of $\pm 1\%$ of its value at all temperatures. Which statement about the uncertainty in $\theta$ is correct?

  • AThe percentage uncertainty in $\theta$ is least near $0^\circ\text{C}$.
  • BThe percentage uncertainty in $\theta$ is least near $100^\circ\text{C}$.
  • CThe actual uncertainty in $\theta$ is least near $0^\circ\text{C}$.
  • DThe actual uncertainty in $\theta$ is least near $100^\circ\text{C}$.

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