Combined Science GCSE
Efficiency
What Efficiency means in Combined Science GCSE, as defined for Pearson Edexcel.
Definition of Efficiency
The ratio of useful energy output to total energy input.
Topics that use Efficiency
- Conservation of energy (Pearson Edexcel GCSE)
- Energy - Forces doing work (Pearson Edexcel GCSE)
Related terms
- Conservation of Energy
- Work Done
- Closed System
- Dissipated Energy
- Dissipation
- Power
- Thermal Conductivity
- Watt
Using Efficiency in the exam
Definition questions usually carry one or two marks, and examiners look for the precise wording. Write the definition from memory, check it against the version above, and then use the term in a longer answer on the same topic so it sticks.
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