Extra exam question E6D10
Subelement E6, CIRCUIT COMPONENTS· Group E6D
What is a primary advantage of using a toroidal core instead of a solenoidal core in an inductor?
- A.Toroidal cores confine most of the magnetic field within the core material (correct answer)
- B.Toroidal cores make it easier to couple the magnetic energy into other components
- C.Toroidal cores exhibit greater hysteresis
- D.Toroidal cores have lower Q characteristics
WhyA primary advantage of a toroidal core over a solenoidal core is that toroidal cores confine most of the magnetic field within the core material. A toroidal core's closed-loop, donut shape confines most of the magnetic field within the core material itself, rather than letting it radiate out into the surrounding area the way a straight solenoidal core does, reducing stray coupling to nearby components, answer A. That containment is actually a disadvantage for coupling energy to other components, not an advantage, and toroids don't inherently have greater hysteresis or lower Q than solenoidal cores.
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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