Extra exam question E6F02
Subelement E6, CIRCUIT COMPONENTS· Group E6F
E6F02
What happens to photoconductive material when light shines on it?
- A.Resistance decreases (correct answer)
- B.Resistance increases
- C.Reflectivity increases
- D.Reflectivity decreases
WhyA photoconductive material's resistance decreases when light shines on it. When light shines on photoconductive material, its electrical resistance decreases, since the light energy frees additional charge carriers within the material, making it easier for current to flow, answer A. Resistance doesn't increase with light exposure, and reflectivity changes aren't the defining photoconductive effect being described here.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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