A transformer is used to power a low-voltage toy railway system.
Give a reason why the mains plug of the transformer is fitted with a fuse.
Explain how a fuse works to protect the circuit when the current becomes too large.
The mains input (primary) potential difference (p.d.) to the transformer is 240 V a.c. The number of turns on the input (primary) coil is 600 and the number of turns on the output (secondary) coil is 30. Calculate the output (secondary) p.d. from the transformer.
State a suitable material for the core of the transformer.
State a suitable metal for the primary and secondary coils of the transformer.
Explain how the specifications of the coils show that this is a step-down 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.