True or False: Grease on conductors can cause the generation of corona.

Grease on conductors can indeed lead to the generation of corona, making the statement true. Corona discharge occurs when the electric field around a conductor is strong enough to ionize the air surrounding it, which can happen in the presence of contaminants such as grease. The presence of grease creates uneven surfaces on the conductor, leading to localized increases in the electric field strength. When the electric field strength exceeds a certain threshold, it can ionize the air around the conductor and produce corona, which manifests as a noticeable glow and can lead to energy loss, noise, and even damage to the insulator.

The generation of corona is particularly relevant in high-voltage applications, but it can occur in other scenarios as well, particularly where conditioning of the conductor surface is not maintained. Therefore, acknowledging the presence of contaminants like grease is important in preventing corona effects in electrical systems.