Technician exam question T6B02
Subelement T6, ELECTRONIC AND ELECTRICAL COMPONENTS· Group T6B
T6B02
What electronic component allows current to flow in only one direction?
- A.Resistor
- B.Fuse
- C.Diode (correct answer)
- D.Driven element
WhyA diode is the electronic component that allows current to flow in only one direction. A diode's semiconductor junction is built to conduct current in one direction and block it in the other, answer C. A resistor (A) passes current equally in both directions, a fuse (B) simply opens the circuit entirely above a current threshold, and "driven element" (D) is an antenna term, unrelated to current direction.
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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