G4C08:Which of the following would reduce RF interference caused by common-mode current on an audio cable?
Direct answer summary (2023-2027 NCVEC pool)
The official correct answer for G4C08 is Place a ferrite choke on the cable.
The key fact is Place a ferrite choke on the cable. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.