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An electrical substation uses a step-down transformer to prepare electricity from a local transmission line for domestic use.

Transformer Diagram

  • The input alternating potential difference from the transmission line is 11 kV11\text{ kV}11 kV.
  • The required output potential difference for residential properties is 220 V220\text{ V}220 V.
  • The primary coil of the substation transformer has 6500 turns6500\text{ turns}6500 turns.

Calculate the number of turns required on the secondary coil of this transformer.

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Induced potential, transformers and the National Grid (physics only) (HT only) Questions

Practise AQA GCSE Physics Induced potential, transformers and the National Grid (physics only) (HT only) with exam-style questions for Foundation and Higher tier. 15 questions covering Induced potential (HT only), Uses of the generator effect (HT only), Microphones (HT only), and Transformers (HT only), matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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Induced potential, transformers and the National Grid (physics only) (HT only) Questions

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