Basic Qualification · B-006 Feedlines and antenna systems · B-006-001-007
What is the major factor influencing the velocity factor of a coaxial cable?
- A Center conductor material
- B Size and spacing of the conductors
- C Use of a solid or braided shield
- D Dielectric material
Correct answer: D — Dielectric material. From the official ISED question bank, verified word for word.
Why
The speed at which a radio signal travels through a coaxial cable depends mostly on the insulating material, called the dielectric, that sits between the inner wire and the outer shield. The full explanation — and one for every question — is in Pro.
Practise this section
Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.