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?
- ACenter conductor material
- BSize and spacing of the conductors
- CUse of a solid or braided shield
- DDielectric 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
Feedlines and antenna systems is section B-006 of the Basic exam: Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.
Drill B-006 — free, no account