Physics for IGCSE & O level - Magnets And Currents (Section 1 - No. 38)
What is the function of a commutator in a DC motor?
To provide AC power.
To reverse the current direction every half cycle.
To provide more power to the coil.
To increase the magnetic field strength.
Giải thích
The commutator reverses the current direction in the coil of a DC motor every half cycle, ensuring continuous rotation.