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13.2 Transformers and the National Grid

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Question 32
H

A student writes three statements about transformers.

Statement 1: A step-up transformer transfers more energy out of the secondary coil than it receives at the primary coil.

Statement 2: Current flows through the iron core from the primary coil to the secondary coil.

Statement 3: Increasing the number of turns on the primary coil increases the potential difference across the secondary coil.

a.

Explain why Statement 1 is wrong.

[2]
b.

Explain why Statement 2 is wrong.

[2]
c.

Explain why Statement 3 is wrong.

[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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