A transformer is to be used to provide a 12 V output from a 240 V supply.
What are suitable numbers of turns for the primary coil and for the secondary coil?
Primary turns = 100, Secondary turns = 2000
Primary turns = 400, Secondary turns = 80
Primary turns = 1200, Secondary turns = 60
Primary turns = 240, Secondary turns = 228
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.