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.
Given below are the BJT MCQ Questions with answers for Electrical Engineering Exams, Job tests, and interviews.
Three regions of BJT are
Three regions of BJT are:
- Emitter, Collector, and Gate
- Emitter, Base and Collector
- Emitter, Gate, and Source
- Source, Drain, and Collector
Correct answer: 2. Emitter, Base and Collector
The region which is lightly doped in BJT is
The region which is lightly doped in BJT is:
- Base
- Collector
- Emitter
- Any of above
Correct answer: 1. Base
The region of BJT which is heavily doped
The region which is heavily doped:
- Base
- Collector
- Emitter
- Any of above
Correct answer: 3. Emitter
In a transistor IC = Ic mA and IE = Ie mA. The value of β is
In a transistor IC = Ic mA and IE = Ie mA. The value of β is:
- 50
- 100
- 150
- 200
Correct answer: 2. 100
The transistor is a ____________ operated device
The transistor is a ____________ operated device:
- Voltage
- Current
- Both of these
- None of these
Correct answer: 2. Current
Correct bias arrangement for a BJT as an amplifier
Which of the following is the correct bias arrangement for a BJT if it is to be operated as an amplifier:
- Both Base emitter junction and Base-collector junction are reverse biased
- Both Base emitter junction and Base-collector junction are forward biased
- Base emitter junction is reverse biased and Base-collector junction is forward biased
- Base emitter junction is forward biased and Base-collector junction is reverse biased
Correct answer: 4. Base emitter junction is forward biased and Base-collector junction is reverse biased
What is the value of collector current when the base resistor is open
What is the value of collector current when the base resistor is open
- 0 mA
- 0.7 mA
- 1.5 mA
- Infinity
Correct answer: 1. 0 mA