Extra exam question E6B09
Subelement E6, CIRCUIT COMPONENTS· Group E6B
What is a common use for point-contact diodes?
- A.As a constant current source
- B.As a constant voltage source
- C.As an RF detector (correct answer)
- D.As a high-voltage rectifier
WhyA common use for point-contact diodes is as an RF detector. Point-contact diodes, an older diode construction using a fine metal wire pressed against a semiconductor crystal, are commonly used as RF detectors, a role their low capacitance and fast response suit them for even though they've largely been superseded by other diode types, answer C. They aren't used as constant current or voltage sources, and their low power handling rules out use as a high-voltage rectifier.
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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