Physics for IGCSE & O level - Magnets And Currents (Section 7 - No. 35)
What is the function of the brushes in a simple A.C. generator?
To make the coil spin.
To make the external circuit turn on.
To connect the external circuit to the slip rings.
To reverse the current direction.
Explanation
The brushes facilitate the electrical connection to the external circuit via the slip rings.