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4.5.6a Construction and operation of a transformer

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Question 10

A laptop charger is connected to a 230 V a.c. mains electrical supply.

a.

The plug of the charger contains a safety fuse. State and explain which of the three wires (live, neutral, or earth) must contain the fuse.

[3]
b.

Inside the power adapter, a transformer is used to reduce the voltage from 230 V a.c. to 23 V a.c.

State the name of this type of transformer.

[1]
c.

Describe the construction of this transformer, including details of the relative number of turns on each coil.

[4]
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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