Extra exam question E5D10
Subelement E5, ELECTRICAL PRINCIPLES· Group E5D
As a conductor’s diameter increases, what is the effect on its electrical length?
- A.Thickness has no effect on electrical length
- B.It varies randomly
- C.It decreases
- D.It increases (correct answer)
WhyAs a conductor's diameter increases, its electrical length increases. As a conductor's diameter increases, its electrical length, its length expressed as a fraction of a wavelength, increases as well, since a thicker conductor has more capacitance per unit length and a slightly lower propagation velocity along its length, answer D. Thickness isn't irrelevant, doesn't vary randomly, and doesn't decrease electrical length, it works in the opposite direction from what C describes.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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