Physics for IGCSE & O level - Magnets And Currents (Section 10 - No. 46)
What is the role of the brushes in an electric motor?
To reverse the current direction.
To provide current to the rotating coil.
To decrease the voltage.
To decrease the strength of the magnet.
Vysvětlení
Brushes connect to the commutator, supplying current to the rotating coil.