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Which component can consist of three semiconductor regions?

Transistor.

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  1. Alternator
  2. Transistor ✔
  3. Triode

Why: A transistor can be made from three regions of semiconductor material. In a bipolar transistor, those regions form two junctions.

Huh, didn't know that: The two common bipolar arrangements are NPN and PNP.

The dad joke
Why does a transistor have three regions? It couldn't decide on just two.
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References

Answer: Transistor. A transistor can be made from three regions of semiconductor material. In a bipolar transistor, those regions form two junctions.

  1. NCVEC 2026-2030 Technician Question Pool, T6B04 ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf
    B. Transistor
    Checked 2026-10-09.

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