Bipolar Junction Transistor (BJT) MCQ [Questions with Answers]

The Bipolar Junction Transistor (BJT) is a basic type of transistor. The BJT is a three-terminal device: Base, Collector, and Emitter. The term bipolar refers to the use of both holes and electronics as current carriers.

Bipolar Junction Transistor MCQ

Three regions of BJT are:

  1. Emitter, Collector, and Gate
  2. Emitter, Base and Collector
  3. Emitter, Gate, and Source
  4. Source, Drain, and Collector

Correct answer: 2. Emitter, Base and Collector


The region which is ligthly doped:

  1. Base
  2. Collector
  3. Emitter
  4. Any of above

Correct answer: 1. Base


The region which is heavily doped:

  1. Base
  2. Collector
  3. Emitter
  4. Any of above

Correct answer: 3. Emitter


In a transistor IC = Ic mA and IE = Ie mA. The value of β is:

  1. 50
  2. 100
  3. 150
  4. 200

Correct answer: 2. 100


The transistor is a _ operated device:

  1. Voltage
  2. Current
  3. Both of these
  4. None of these

Correct answer: 2. Current

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