G4C02:Which of the following could be a cause of interference covering a wide range of frequencies?
Direct answer summary (2023-2027 NCVEC pool)
The official correct answer for G4C02 is Arcing at a poor electrical connection.
The key fact is Arcing at a poor electrical connection. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.