General exam question G7A04
Subelement G7, PRACTICAL CIRCUITS· Group G7A
G7A04
What is characteristic of a half-wave rectifier in a power supply?
- A.Only one diode is required (correct answer)
- B.The ripple frequency is twice that of a full-wave rectifier
- C.More current can be drawn from the half-wave rectifier
- D.The output voltage is two times the peak input voltage
WhyA half-wave rectifier in a power supply requires only one diode. A half-wave rectifier needs only a single diode, since it simply blocks one half of each AC cycle and passes the other, answer A. Its ripple frequency is the same as the input AC frequency, not twice, it delivers less usable current than an equivalent full-wave design (since it only uses half the waveform), and its output voltage isn't doubled, so B, C, and D are wrong.
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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