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10.3 Electrical energy and power

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Question 8

A de-icing strip on an outdoor sensor operates in two modes. The controller changes the connection between sections of the strip.

ModePotential differenceOperating detailTime
boost24 Vcurrent =4.0 A45 s
normal24 Vresistance =12 Ω3.0 min

Calculate the mean power transferred to the de-icing strip during one complete operating cycle.

[4]
Markscheme

10.3 Electrical energy and power Questions

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

105 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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