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13.2 Transformers and the National Grid

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Question 9

A transformer supplies a portable work light used on a building site. The transformer is 100% efficient.

QuantityValue
Potential difference across the secondary coil24 V
Current in the secondary coil5.0 A

Calculate the power supplied to the primary coil.

Use the equation

P=V×IP = V \times IP=V×I

[2]
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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