What material are brushes in generators typically made from?

The brushes in generators are typically made from carbon-based materials. This choice is correct because carbon possesses excellent conductivity, which is essential for efficient electrical transfer within the generator. Additionally, carbon is resilient and can withstand the wear that occurs during contact with the rotating commutator.

Using carbon-based materials allows the brushes to endure high temperatures and maintain good performance over time, as they can effectively conduct electricity while also minimizing sparking and wear on both the brushes and the commutator surface.

Other materials such as metal, while conductive, may not provide the necessary friction or may cause excessive wear on the commutator. Plastic would not provide sufficient conductivity for effective operation in this role. Similarly, wood is not viable due to its non-conductive nature and inability to withstand the operational conditions within a generator.