Extra exam question E5D06
Subelement E5, ELECTRICAL PRINCIPLES· Group E5D
What parasitic characteristic creates an inductor’s self-resonance?
- A.Skin effect
- B.Dielectric loss
- C.Coupling
- D.Inter-turn capacitance (correct answer)
WhyAn inductor's self-resonance is created by the capacitance between its adjacent turns. An inductor's self-resonance comes from the small but real capacitance that exists between its adjacent turns of wire, and at a high enough frequency that inter-turn capacitance resonates with the inductor's own inductance, causing the component to stop behaving like a pure inductor, answer D. Skin effect, dielectric loss, and coupling are related concerns but aren't what actually creates this self-resonant behavior.
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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