General exam question G7B04
Subelement G7, PRACTICAL CIRCUITS· Group G7B
G7B04
In a Class A amplifier, what percentage of the time does the amplifying device conduct?
- A.100% (correct answer)
- B.More than 50% but less than 100%
- C.50%
- D.Less than 50%
WhyIn a Class A amplifier, the amplifying device conducts 100% of the time. A Class A amplifier is biased so its active device stays conducting through the entire input cycle, 100% of the time, which is what gives Class A its characteristically clean but inefficient operation, answer A. The partial conduction described in B, C, and D characterizes Class AB, B, and C amplifiers instead, not Class A.
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.