Physics for IGCSE & O level - Magnets And Currents (Section 4 - No. 17)
Which of the following is used in AC generator, but NOT in DC generator?
Coil
Magnets
Slip rings
Brushes
คำอธิบาย
AC generators use slip rings to maintain the alternating current flow without reversal. DC generators use a commutator to provide a DC output.