A student is experimenting with a low-voltage power supply for an electronic project. The setup uses a step-down transformer connected to the mains AC supply.
The supply voltage is 240 V. The transformer has 800 turns on the primary (input) coil and 50 turns on the secondary (output) coil.
Calculate the output voltage of this transformer.
output voltage = ............................................................ V\text{V}V
Transformers can be step-up or step-down.
Describe the difference in the coil winding arrangement (number of turns on the primary and secondary coils) for these two types of transformers.
Electrical energy is transmitted across the National Grid at very high voltages.
Explain the advantage of transmitting electricity at high voltages, rather than at low 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.