General exam question G7A05
Subelement G7, PRACTICAL CIRCUITS· Group G7A
G7A05
What portion of the AC cycle is converted to DC by a half-wave rectifier?
- A.90 degrees
- B.180 degrees (correct answer)
- C.270 degrees
- D.360 degrees
WhyA half-wave rectifier converts 180 degrees of the AC cycle to DC. A half-wave rectifier only lets current through during one polarity of the AC cycle, which is 180 degrees, half the full 360-degree cycle, and blocks the other half entirely, answer B. The other values don't correspond to exactly one-half of a full AC cycle.
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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