Physics for IGCSE & O level - Magnets And Currents (Section 3 - No. 20)
What are the main components of a basic transformer?
A coil, slip rings, and magnets
A primary coil, a secondary coil, and an iron core
A battery, a coil, and a commutator
Brushes, commutator, and a magnetic field
Forklaring
A transformer consists of a primary coil, a secondary coil, and a core (usually iron).