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How a transformer works

How a transformer works

Labelled transformer with primary coil, secondary coil, iron core, AC input, induced AC output, and arrows showing the changing magnetic field A transformer changes the size of an alternating potential difference using two coils and an iron core. The primary coil is connected to the input supply, and the secondary coil is connected to the output circuit.

Transformers and the national grid Lesson

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

Step-by-step lessons covering Edexcel GCSE Physics Transformers and the national grid for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Master the required practical work and core equations early, since both papers can draw on content and maths skills from across the whole specification.

Lessons