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Edexcel International A Level · Physics

Practical Skills in Physics I(Unit 3) revisionBuild it yourself.

Unit 3 covers 3 topics and 13 subtopics. Pick the ones you keep getting wrong and LOCKIN writes you an original exam-style paper, with a full mark scheme.

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What's in Unit 3

Every topic below can be selected on its own, or combined into one paper.

Mechanics and materials practicals

  • Acceleration of free fall
  • Viscosity by falling ball
  • The Young modulus

Usually 3–10 marks

Waves and electricity practicals

  • Speed of sound on an oscilloscope
  • Frequency of a vibrating string
  • Wavelength with a diffraction grating
  • Resistivity of a wire
  • E.m.f. and internal resistance

Usually 3–10 marks

Planning, measurement and processing

  • Planning an investigation
  • Instruments, resolution and systematic error
  • Uncertainties and how they combine
  • Processing results and choosing a graph
  • Conclusions from a gradient or intercept

Usually 2–10 marks

Other Physics units

Unit 1Unit 2Unit 4Unit 5Unit 6

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