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13.2 Transformers and the National Grid

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Question 10

Complete the following sentence by choosing the correct phrase from the box.

  • the current is increased
  • the resistance of the cables becomes zero
  • thermal energy transfer to the surroundings is reduced
  • the voltage is decreased
  • power loss is increased

Step-up transformers are used to increase the voltage before transmission across overhead cables so that __________.

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Markscheme

13.2 Transformers and the National Grid Questions

  1. GCSE
  2. /Physics
  3. /13.2 Transformers and the National Grid

28 exam-style questions on Edexcel GCSE Physics 13.2 Transformers and the National Grid, covering 13.2.1 Transformers and induction, 13.2.2 The transformer turns-ratio equation, 13.2.3 The National Grid, 13.2.4 The transformer power equation, and 13.2.5 Advantages of high-voltage transmission. Each one has a worked solution and a mark scheme showing where the marks go.

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