What is the primary reason transformers require alternating current (AC) to function?
To produce a constant magnetic field in the iron core.
To produce a changing magnetic field in the iron core.
To produce a high temperature in the iron core.
To produce a direct electric current in the secondary coil.
Flashcards for Edexcel GCSE Physics Transformers and the national grid, covering the key terms, definitions and equations you need to recall for Paper 1 and Paper 2. 1 card, matched to the Edexcel GCSE Physics (1PH0) specification. Recall questions account for roughly 40% of marks at GCSE Physics, so these target the marks you can secure before the paper starts.
