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13.2 Transformers and the National Grid

13.2 Transformers and the National Grid

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Question 2

An industrial electric arc furnace is connected to the national grid via a step-down transformer:

  • the primary voltage of the transformer is 33 000 V33\,000\text{ V}33000 V
  • the secondary voltage is 400 V
  • the secondary current delivered to the furnace is 1650 A

Calculate the primary current. Use the equation:

Ip=Vs×IsVp I_p = \frac{V_s \times I_s}{V_p} Ip​=Vp​Vs​×Is​​
[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. Each one has a worked solution and a mark scheme showing where the marks go.

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