A smart doorbell system uses a step-down transformer connected to the mains supply to power the outdoor unit.
Explain the function of a step-down transformer.
State the name of the magnetic material from which the core of the transformer is made.
The transformer has an input voltage of 230 V230\text{ V}230 V and an output voltage of 18 V18\text{ V}18 V. There are 460046004600 turns on the input coil.
Calculate the number of turns on the output coil.
Electricity is transmitted from power stations through the National Grid at very high voltages.
State two advantages of transmitting electricity at high voltages.
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.