Transformers and the national grid

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Question 2
Hard

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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Transformers and the national grid Questions

  1. GCSE
  2. /Physics
  3. /Transformers and the national grid