A transformer for a model toy electric train is used to transform the mains voltage of 230 V to 11.5 V.
The number of turns on the secondary coil is 250.
Which statement about the transformer is correct?
It is a step-down transformer and has 500050005000 turns on its primary coil.
It is a step-down transformer and has 12.512.512.5 turns on its primary coil.
It is a step-up transformer and has 500050005000 turns on its primary coil.
It is a step-up transformer and has 12.512.512.5 turns on its primary 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.