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How a transformer works

How a transformer works

Transformer schematic showing insulated primary and secondary coils linked by a changing magnetic field in a laminated soft iron core, with no wire connection between the circuits A transformer has a primary coil, a secondary coil and a shared soft iron core. The coils are insulated from each other, so charge does not pass directly between the two circuits.

13.2 Transformers and the National Grid Lesson

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

Step-by-step lessons 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 builds up to exam-style questions. Master the required practical work and core equations early, since both papers can draw on content and maths skills from across the whole specification.

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