BJT Amplifiers and Oscillators MCQs

Question 1

The most stab by

Accepted Answer

CC configure

Answer

CE configure

Answer

vani temp

Answer

none of these

Question 2

To have a better value of stability factor (S) for an amplifier using emitter bias, the condition is

Accepted Answer

RB / Rc should be as small asis practically possible

Answer

RB / RE should be as large as possible

Answer

emitter resistor should be bypassed by a capacitor

Answer

none of these

Question 3

Stability factor (S") is defined as

Accepted Answer

dependence of lc on fis with 'Co and and IB as constant

Answer

dependence of IC on IB with lc? and as constant

Answer

dependence of IC on IB, and lc?

Answer

none of these

Question 4

Stability factor (S') is defined as

Accepted Answer

dependence of lc on IB with 'CO and as constant

Answer

dependence of lc on f3 with I IB as constant

Answer

dependence of lc on 13, lc? and IB

Answer

none of these

Question 5

An attempt made to reduce S will

Accepted Answer

not affect S' and S"

Answer

enhance both S' and S"

Answer

reduce both S' and S"

Answer

enhance both S' and reduce S"

Question 6

In a germanium transistor amplifier-

Accepted Answer

effect of lc? has a dominant influence on IC

Answer

effect of IB has a dominant influence on lc

Answer

the stability factor (S) is lower as compared with that of a silicon transistor amplifier

Answer

none of these

Question 7

We have to design a common?emitter amplifier with a silicon?transistor, the bias circuit should be such it aims at reducing the value of

Accepted Answer

S"

Answer

S

Answer

S'

Answer

none of these

Question 8

For the transistor amplifier to be inherently stable against thermal runway, the condition is

Accepted Answer

VcE <VCC

Answer

VcE > Vcc

Answer

VcE=Vcc

Answer

none of these

Question 9

The power handling capability of a given transistor is dependent upon

Accepted Answer

maximum junction temperature and expected ambient temperature

Answer

the maximum temperature at which the junction of the device is permitted to operate

Answer

the actual ambient temperature expected during operation

Answer

none of these