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13.2 Transformers and the National Grid

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Question 7

In a transformer used for a low-voltage chime system:

  • the primary voltage is 240 V
  • the primary current is 0.030 A
  • the secondary voltage is 12.0 V

Calculate the secondary current. Use the equation:

Is=Vp×IpVs I_s = \frac{V_p \times I_p}{V_s} Is​=Vs​Vp​×Ip​​
[2]
Markscheme

13.2 Transformers and the National Grid Questions

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

28 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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