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8.3 Power and efficiency

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Question 20

An automatic sliding door has a total power input of 80 W. Its useful power output while moving is 52 W.

Calculate the efficiency of the automatic sliding door.

[2]
Markscheme

8.3 Power and efficiency Questions

  1. GCSE
  2. /Physics
  3. /8.3 Power and efficiency

128 exam-style questions on Edexcel GCSE Physics 8.3 Power and efficiency, covering 8.3.1 Power and 8.3.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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