General exam question G9A05
Subelement G9, ANTENNAS AND FEED LINES· Group G9A
How does the attenuation of coaxial cable change with increasing frequency?
- A.Attenuation is independent of frequency
- B.Attenuation increases (correct answer)
- C.Attenuation decreases
- D.Attenuation follows Marconi’s Law of Attenuation
WhyCoaxial cable's attenuation increases with increasing frequency. Coaxial cable's loss mechanisms, conductor skin-effect resistance and dielectric loss, both get worse as frequency rises, so a cable's attenuation per unit length increases with increasing frequency, answer B. It isn't independent of frequency, it doesn't decrease with rising frequency, and there's no such thing as "Marconi's Law of Attenuation," so A, C, and D are wrong.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2023-2027 NCVEC Element 3 pool (public domain); the explanation above is original writing, see our methodology.
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