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10.3 Electrical energy and power

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Question 1

A transformer winding has a resistance of 0.50 Ω. In two tests, it carries currents of 7.0 A and 4.0 A. Each current flows for 60 s. How much more energy is dissipated in the winding during the test with the larger current?

[1]
A

990 J990\ \mathrm{J}990 J

B

1980 J1980\ \mathrm{J}1980 J

C

1470 J1470\ \mathrm{J}1470 J

D

270 J270\ \mathrm{J}270 J

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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