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8.3 Power and efficiency

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Question 23

A pottery kiln operates at 4.5 kW for 2.0 hours2.0\ \mathrm{hours}2.0 hours. A ventilation fan operates at 250 W.

Calculate how many hours longer the ventilation fan must operate to transfer the same total energy as the pottery kiln.

[5]
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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