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Edexcel International A Level · Physics

Waves and Electricity(Unit 2) revisionBuild it yourself.

Unit 2 covers 2 topics and 21 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 2

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

Waves and the Particle Nature of Light

  • Wave properties and the wave equation
  • Longitudinal, transverse and wave graphs
  • Superposition, coherence and phase
  • Standing waves on strings
  • Intensity of radiation
  • Refraction and refractive index
  • Total internal reflection
  • Polarisation
  • Diffraction and the grating equation
  • Electron diffraction and de Broglie
  • Waves at boundaries and pulse-echo
  • Photons and the photoelectric effect
  • The electronvolt and line spectra

Usually 2–11 marks

Electric Circuits

  • Current, charge and potential difference
  • Resistance, Ohm's law and I-V graphs
  • Series and parallel circuits
  • Electrical power and energy
  • Resistivity and charge carriers
  • Potential dividers
  • E.m.f. and internal resistance
  • Temperature and light dependence of resistance

Usually 2–10 marks

Other Physics units

Unit 1Unit 3Unit 4Unit 5Unit 6

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