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Measurements and data2.2 Measurements and uncertainty2.2.1
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Course idea

Measurements and uncertainty

OCR A AS Physics · 2.2.1

Explore measurements and uncertainty within measurements and data. Every measurement has uncertainty. Repeated readings, sensible instruments and clear graphs help you distinguish a physical pattern from experimental scatter.

Specification outcomes (4)
  • 2.2.1(a) Understand systematic errors (including zero errors) and random errors in measurements.
  • 2.2.1(b) Understand precision and accuracy in the context of measurement.
  • 2.2.1(c) Calculate absolute and percentage uncertainties when data are combined by addition, subtraction, multiplication, division or raising to powers.
  • 2.2.1(d) Use graphical treatment of errors and uncertainties, including line of best fit, worst line, absolute and percentage uncertainties, and percentage difference.
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H156 v2.0 · May 2026

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