Bipolar Junction Transistor (BJT) Quiz

What is a transistor?

• A passive component

• A four-terminal device

• A three-terminal device

• A two-terminal device

Which of the following is NOT a common application of transistors?

• Switching circuits

• Audio amplifiers

• Mechanical relays

• Voltage regulators

What are the two basic types of transistors?

• Analog and Digital

• BJT and FET

• Silicon and Germanium

• NPN and PNP

What does BJT stand for?

• Bipolar Junction Technology

• Bipolar Joint Transistor

• Bipolar Junction Transistor

• Binary Junction Transistor

Which region of a BJT is the emitter?

• The collector region

• The middle region

• The region with the lowest doping

• The region with the highest doping

In an NPN transistor, the direction of the arrow in the symbol indicates what?

• Voltage drop across the base

• Current flow from collector to emitter

• Doping concentration

• Current flow from emitter to collector

What is the purpose of biasing in a BJT?

• To reduce power consumption

• To establish a stable operating point

• To enhance signal frequency

• To increase the current

What happens when both junctions of a BJT are forward-biased?

• The transistor is in active region

• The transistor is in saturation region

• The transistor is in reverse active region

• The transistor is in cutoff region

What is the typical voltage drop across the base-emitter junction of a silicon BJT?

• 0.5 V

• 1.0 V

• 0.2 V

• 0.7 V

Which mode of operation is used for amplification in a BJT?

• Reverse active mode

• Active mode

• Saturation mode

• Cutoff mode