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10.3 Electrical energy and power

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Question 5

A domestic air-source heat pump has an electrical power input of 3200 W.

Show that the heat pump uses 8.64 MJ8.64\text{ MJ}8.64 MJ of electrical energy when running continuously for 45 minutes45\text{ minutes}45 minutes.

[3]
Markscheme

10.3 Electrical energy and power Questions

  1. GCSE
  2. /Physics
  3. /10.3 Electrical energy and power

31 exam-style questions on Edexcel GCSE Physics 10.3 Electrical energy and power, covering 10.3.1 The heating effect of an electric current, 10.3.2 Reducing energy transfer in wires, 10.3.3 Advantages and disadvantages of the heating effect, 10.3.4 Energy transferred by an electrical circuit, 10.3.5 Electrical power, and 10.3.6 Energy transfers in domestic devices. Each one has a worked solution and a mark scheme showing where the marks go.

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