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Useful and wasted transfers

Useful and wasted transfers

Sankey diagram of an electric motor with 100 J electrical input, 70 J useful kinetic output and 30 J wasted as thermal energy and sound In any device, energy is transferred from one store to another. The useful transfer is the part that does the job we want, while wasted energy is usually dissipated to the surroundings as heating or sound.

Efficiency and energy resources Lesson

  1. GCSE
  2. /Physics
  3. /Efficiency and energy resources

Step-by-step lessons covering Edexcel GCSE Physics Efficiency and energy resources for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Master the required practical work and core equations early, since both papers can draw on content and maths skills from across the whole specification.

Lessons

Energy stores, transfers and conservationEfficiency and energy resources