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HomeWJEC GCSE PhysicsEnergy and Power
WJEC · GCSE · Physics · Revision Notes

Energy and Power

60 words · Last updated July 2026

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What you'll learn

Energy, power and efficiency.

Key ideas

  • Energy stores and transfers; conservation; GPE = mgh.
  • Power (rate of transfer); efficiency; renewable vs non-renewable resources.

Exam tips

  • Efficiency = useful output ÷ total input.
  • Give balanced pros/cons of resources.

Common mistakes

  • Confusing energy and power.
  • Calling fossil fuels renewable.
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