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Physics (AS & A Level) · Oct / Nov 2023 · Paper 12 · Question 16

9702Energy conservation

What is meant by the efficiency of a system?

  1. Athe total energy input to the system divided by the useful energy output by the system
  2. Bthe useful energy output from the system divided by the energy wasted by the system
  3. Cthe useful energy output from the system divided by the total energy input to the system
  4. Dthe energy wasted by the system divided by the total energy input to the system

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Correct answer: C. the useful energy output from the system divided by the total energy input to the system

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