G4E02:What is the purpose of a corona ball on an HF mobile antenna?
Direct answer summary (2023-2027 NCVEC pool)
The official correct answer for G4E02 is To reduce RF voltage discharge from the tip of the antenna while transmitting.
The key fact is To reduce RF voltage discharge from the tip of the antenna while transmitting. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.