Bipolar Junction Transistor MCQs

Question 1

which of the following is valid for both P-N-P as well as N-P-N transistors?

Accepted Answer

The EB junction is forward biased for active operation

Answer

The emitter injects holes into the base region

Answer

The electrons are the minority carriers in the base region

Answer

When biased in the active region, current flows into emitter terminal

Question 2

In a transistor with normal bias

Accepted Answer

the emitter junction hasa low resistance

Answer

the emitter junction offers high resistance

Answer

the emitter junction is reverse biased

Answer

none of the above

Question 3

Which region of a transistor is lightly doped?

Accepted Answer

Base

Answer

Collector

Answer

Emitter

Answer

All regions are equally doped

Question 4

Semiconductor is a material which

Accepted Answer

has conductivity greater than insulator

Answer

allows one type of carriers alone to pass through it

Answer

allows current to flow in one direction but not in the opposite direction

Answer

all the above

Question 5

is the region of a transistor which has highest conductivity.

Accepted Answer

Emitter

Answer

Base

Answer

Collector

Answer

Any of the above

Question 6

Bipolar transistor is a

Accepted Answer

three layer semiconductor device

Answer

three terminal semiconductor device

Answer

three junction semiconductor device

Answer

none of the above

Question 7

Silicon controlled rectifier belongs to

Accepted Answer

thyristor family

Answer

diode family

Answer

triode family

Answer

none of the above

Question 8

Current flow through a bipolar transistor is by means of

Accepted Answer

both electrons and holes

Answer

electrons

Answer

holes

Answer

none of the above

Question 9

Transistor works as an open switch when emitter junction is biased and collector junction is biased

Accepted Answer

reverse, reverse

Answer

forward, reverse

Answer

reverse, forward

Answer

forward, forward