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7.3 Induced potential, transformers and the National Grid (HT only)

7.3 Induced potential, transformers and the National Grid (HT only)

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Question 1

A portable power supply consists of an alternator connected to a transformer to power a device.

  • The device requires an input potential difference of 12 V.
  • The alternator generates an alternating potential difference of 3.0 V.
  • The primary coil of the transformer has 200 turns200\text{ turns}200 turns.

Calculate the number of turns needed on the secondary coil.

[3]
Markscheme

7.3 Induced potential, transformers and the National Grid (HT only) Questions

  1. GCSE
  2. /Physics
  3. /7.3 Induced potential, transformers and the National Grid (HT only)

2 exam-style questions on AQA GCSE Physics 7.3 Induced potential, transformers and the National Grid (HT only), covering 7.3.1 Induced potential (HT only), 7.3.2 Uses of the generator effect (HT only), 7.3.3 Microphones (HT only), and 7.3.4 Transformers (HT only). Each one has a worked solution and a mark scheme showing where the marks go.

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