EnergyHigh Exam FrequencyAQA

Efficiency

Revise Efficiency in Energy for GCSE Physics with 19 exam-style questions and 4 flashcards. This is a high-frequency exam topic, so students should expect to explain it clearly under timed conditions.

Sample Flashcards

As a decimal
0.85 (between 0 and 1)
As a percentage
85% (multiply decimal by 100)

Sample Questions

Which equation correctly defines efficiency?

  • A. efficiency = total input energy / useful output energy
  • B. efficiency = useful output energy transfer / total input energy transfer
  • C. efficiency = wasted energy / total input energy
  • D. efficiency = total input energy / wasted energy
1 markfoundation

Explain one method that can be used to reduce unwanted energy transfers in a machine and state how it reduces waste.

2 marksstandard

19

exam-style questions

4

revision flashcards

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