Extra exam question E6D08
Subelement E6, CIRCUIT COMPONENTS· Group E6D
Which of the following materials has the highest temperature stability of its magnetic characteristics?
- A.Brass
- B.Powdered iron (correct answer)
- C.Ferrite
- D.Aluminum
WhyPowdered iron has the highest temperature stability of its magnetic characteristics among these materials. Powdered iron cores generally hold their magnetic characteristics more consistently across a range of operating temperatures than ferrite cores do, making them the more temperature-stable choice among common inductor core materials, answer B. Brass and aluminum aren't magnetic core materials in the same sense at all (they're actually used to reduce inductance, not enhance it), and ferrite is the material being compared against, not the more stable option here.
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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