General exam question G4E09
Subelement G4, AMATEUR RADIO PRACTICES· Group G4E
What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?
- A.0.02 VDC
- B.0.5 VDC (correct answer)
- C.0.2 VDC
- D.1.38 VDC
WhyA fully illuminated silicon photovoltaic cell produces an approximate open-circuit voltage of 0.5 VDC. A single fully illuminated silicon photovoltaic cell produces an open-circuit voltage of roughly 0.5 volt DC, which is why practical panels wire many cells in series to reach a usable charging voltage, answer B. The other values are off by roughly an order of magnitude too low (A, C) or don't match silicon photovoltaic cell behavior (D).
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.
Related questions
- G4E01What is the purpose of a capacitance hat on a mobile antenna?
- G4E02What is the purpose of a corona ball on an HF mobile antenna?
- G4E03Which of the following direct, fused power connections would be the best for a 100-watt HF mobile installation?
- G4E04Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?
- G4E05Which of the following most limits an HF mobile installation?