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13.2 Transformers and the National Grid

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1
Question 1

A step-up transformer at a power station converts a voltage of 25,000 V25,000\text{ V}25,000 V to 400,000 V400,000\text{ V}400,000 V for power transmission across the National Grid.

Explain how the design of this transformer enables the voltage to be stepped up from 25,000 V25,000\text{ V}25,000 V to 400,000 V400,000\text{ V}400,000 V.

Your answer should include:

  • details of the structure of this transformer
  • how a transformer works, using the principles of electromagnetic induction
  • how the design of this transformer ensures that the exact target voltage of 400,000 V400,000\text{ V}400,000 V is achieved.
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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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