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

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Question 33

A low-voltage lighting system in a workshop is supplied by a transformer connected to a 230 V supply. When all the lamps are switched on, the potential difference across the secondary coil is 48 V and the current in the secondary coil is 12 A. The transformer is 100% efficient.

Calculate the current in the primary coil.

[3]
Markscheme

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

  1. GCSE
  2. /Physics
  3. /7.3 Induced potential, transformers and the National Grid (HT only)

96 exam-style questions on AQA GCSE Physics 7.3 Induced potential, transformers and the National Grid (HT only), covering 7.3.1 Induced potential (HT only), 7.3.2 Uses of the generator effect (HT only), 7.3.3 Microphones (HT only), and 7.3.4 Transformers (HT only). Each one has a worked solution and a mark scheme showing where the marks go.

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