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General exam question G7A11

Subelement G7, PRACTICAL CIRCUITS· Group G7A

G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

  • A.Symbol 1
  • B.Symbol 2 (correct answer)
  • C.Symbol 7
  • D.Symbol 11

WhySymbol 2 in figure G7-1 represents an NPN junction transistor. In figure G7-1, symbol 2 is drawn as a circle with an emitter lead carrying an arrow, the schematic convention for a bipolar junction transistor, and its arrow direction identifies it specifically as NPN, answer B. Symbols 1, 7, and 11 represent other components in the figure, none matching a bipolar transistor's emitter-arrow construction.

Schematic diagram G7-1 showing numbered semiconductor and component symbols for a component-identification question, including a field-effect transistor, an NPN bipolar transistor, a Zener diode, a transformer, and a tapped inductor.

Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2023-2027 NCVEC Element 3 pool (public domain); the explanation above is original writing, see our methodology.

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