The plug of a microwave oven contains a fuse. Explain the purpose of the fuse.
The internal power supply of the microwave oven includes a step-down transformer.
State the material used to make the core of this transformer.
The transformer operates with an input voltage of 230 V230\text{ V}230 V and an output voltage of 11.5 V11.5\text{ V}11.5 V. The primary (input) coil has 460460460 turns. Calculate the number of turns on the secondary (output) coil.
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.