Basic Qualification · B-006 Feedlines and antenna systems · B-006-007-002
What does vertical wave polarization mean?
- A The magnetic lines of force of a radio wave are perpendicular to the Earth's surface
- B The electric and magnetic lines of force of a radio wave are parallel to the Earth's surface
- C The electric lines of force of a radio wave are parallel to the Earth's surface
- D The electric lines of force of a radio wave are perpendicular to the Earth's surface
Correct answer: D — The electric lines of force of a radio wave are perpendicular to the Earth's surface. From the official ISED question bank, verified word for word.
Why
A radio wave is called vertically polarized when its electric lines of force stand straight up and down, perpendicular to the Earth's surface, much like a pole planted in the ground. 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.