Bipolar Junction Transistor MCQs

Question 1

When a BJT is employed as an amplifier, it operates

Accepted Answer

over theactive region

Answer

in cut-off

Answer

in saturation

Answer

well into saturation

Question 2

Which of the following method used for biasing a BJT in integrated circuits is considered independent of transistor beta?

Accepted Answer

voltage divider bias

Answer

fixed biasing

Answer

collector feedback bias

Answer

base bias with collector feedback

Question 3

In an ac amplifier, larger the internal resistance of the ac signal source

Accepted Answer

smaller the circuit voltage gain

Answer

greater the overall voltage gain

Answer

greater the input impedance

Answer

smaller the current gain

Question 4

The main use of an emitter follower is as

Accepted Answer

impedance matching device

Answer

power amolifier

Answer

low-input impedance circuit

Answer

follower of base signal

Question 5

An ideal amplifier is one which

Accepted Answer

responds only to signals at its input terminals

Answer

has infinite voltage gain

Answer

has positive feedback

Answer

gives uniform frequency response

Question 6

The smallest of the four h-parameters of a transistor is

Accepted Answer

h0

Answer

hi

Answer

ht.

Answer

hf

Question 7

The voltage gain of a single-stage CE amplifier is increased when

Accepted Answer

ac load resistance is increased

Answer

its ac load is decreased

Answer

resistance of signal source is increased

Answer

emitter resistance RE is increased

Question 8

When emitter bypass capacitor in a CE amplifier is removed, its is considerably reduced.

Accepted Answer

voltage gain

Answer

input resistance

Answer

output load resistance

Answer

emitter current

Question 9

Unique features of a CC amplifier circuit is that it

Accepted Answer

all of the above

Answer

steps up the impedance level

Answer

does not increase signal voltage

Answer

acts as an impedance matching device