Technician exam question T6D02
Subelement T6, ELECTRONIC AND ELECTRICAL COMPONENTS· Group T6D
T6D02
What is a relay?
- A.An electrically-controlled switch (correct answer)
- B.A current-controlled amplifier
- C.An inverting amplifier
- D.A pass transistor
WhyA relay is an electrically-controlled switch. A relay is a switch whose contacts are opened or closed by an electromagnet, letting a small control current switch a separate, often higher-power circuit, exactly what "electrically-controlled switch" describes, answer A. B, C, and D all describe amplifier-style circuits, not a mechanical switching device.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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