Amateur Extra › E4 Amateur Practices › E4E07
E4E07
Which of the following can cause shielded cables to radiate or receive interference?
Pick an answer to check it.
Answer: B. Common-mode currents on the shield and conductors
Common-mode current flows on the outside of the shield as well as the conductors. That turns the cable into an antenna that can radiate or pick up interference.
Tip: Common-mode current makes cables into antennas.