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13.2 Transformers and the National Grid

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Question 37

A transformer in a low-voltage workshop supply is 100% efficient.

QuantityPrimary coilSecondary coil
Potential difference230 V12 V
Current0.12 A

Use the equation

VP×IP=VS×ISV_P \times I_P = V_S \times I_SVP​×IP​=VS​×IS​

Calculate the current in the secondary coil.

[3]
Markscheme

13.2 Transformers and the National Grid Questions

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

108 exam-style questions 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 has a worked solution and a mark scheme showing where the marks go.

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