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⚛️ Physics  ·  Semiconductor Electronics  ·  NEET & JEE

NPN transistor has three terminals:

Answer: Emitter, Base, Collector.

  • A Emitter, Base, Collector
  • B Gate, Source, Drain
  • C Anode, Cathode, Grid
  • D Source, Sink, Channel

Correct answer: A. Emitter, Base, Collector

Explanation: Transistor terminals: Emitter (E), Base (B), Collector (C). BJT (Bipolar Junction Transistor).

Conductorconduction bandvalence bandbands overlapSemiconductorconduction bandvalence bandsmall gap (~1 eV)Insulatorconduction bandvalence bandlarge gap(> 3 eV)

Conductors have overlapping bands, semiconductors have a small energy gap that can be bridged by heat or doping, and insulators have a large gap that blocks conduction.

Concept context

Band theory, p-n junction, diodes, transistors, logic gates, and integrated circuits.

Read the full Semiconductor Electronics notes →