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4.5.6a Construction and operation of a transformer

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Question 23
a.

A washing machine has a metal casing. A fault occurs inside the washing machine and a live wire touches the metal casing.

Explain how the earth wire and the fuse in the plug work together to protect the user from receiving an electric shock.

[4]
b.

The washing machine contains a transformer to power its internal electronic controls. The input voltage to the transformer is 230 V230\text{ V}230 V and the output voltage is 11.5 V11.5\text{ V}11.5 V. The input coil of this transformer has 400040004000 turns.

Calculate the number of turns on the output coil.

[3]
Markscheme

4.5.6a Construction and operation of a transformer Questions

  1. IGCSE
  2. /Physics
  3. /4.5.6a Construction and operation of a transformer

136 exam-style questions on CIE IGCSE Physics 4.5.6a Construction and operation of a transformer. Each one has a worked solution and a mark scheme showing where the marks go.

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