Basic Qualification · B-007 Radio wave propagation · B-007-004-009
How does the bandwidth of a transmitted signal affect selective fading?
- A It is more pronounced at narrow bandwidths
- B It is more pronounced at wide bandwidths
- C It is the same for both wide and narrow bandwidths
- D Only the receiver bandwidth determines the selective fading effect
Correct answer: B — It is more pronounced at wide bandwidths. From the official ISED question bank, verified word for word.
Why
Selective fading happens when different parts of a radio signal arrive at the receiver at slightly different times, causing them to cancel each other out. The full explanation — and one for every question — is in Pro.
Practise this section
How signals travel: the ionosphere and its layers, skip, ground wave, sporadic E, and which bands work when.