General exam question G5C10
Subelement G5, ELECTRICAL PRINCIPLES· Group G5C
What is the inductance of three 10-millihenry inductors connected in parallel?
- A.0.30 henries
- B.3.3 henries
- C.3.3 millihenries (correct answer)
- D.30 millihenries
WhyThree 10-millihenry inductors connected in parallel have an inductance of about 3.3 millihenries. Three equal inductors in parallel combine to one-third the value of a single one, so three 10-millihenry inductors in parallel give 10 ÷ 3, about 3.3 millihenries, answer C. B is off by a factor of 1,000 (henries instead of millihenries), and A and D don't match the parallel-inductance formula applied to three equal 10 mH inductors.
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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