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Free download in PDF Multistage Transistor Amplifier Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
In transistor amplifiers, we use ……………. transformer for impedance matching
[A]
Step up
[B]
Step down
[C]
Same turn ratio
[D]
None of the above
(2)
RC coupling is not used to amplify extremely low frequencies because ………
[A]
There is considerable power loss
[B]
There is hum in the output
[C]
Electrical size of coupling capacitor becomes very large
[D]
None of the above
Answer: Electrical size of coupling capacitor becomes very large
(3)
The ear is not sensitive to ………….
[A]
Frequency distortion
[B]
Amplitude distortion
[C]
Frequency as well as amplitude distortion
[D]
None of the above
Answer: Frequency distortion
(4)
The final stage of a multistage amplifier uses ………………
[A]
RC coupling
[B]
Transformer coupling
[C]
Direct coupling
[D]
Impedance coupling
Answer: Transformer coupling
(5)
If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is ……….
[A]
600 db
[B]
24 db
[C]
14 db
[D]
27 db
(6)
Transformer coupling is generally employed when load resistance is ………
[A]
Large
[B]
Very large
[C]
Small
[D]
None of the above
(7)
Transformer coupling provides high efficiency because …………
[A]
Collector voltage is stepped up
[B]
c. resistance is low
[C]
collector voltage is stepped down
[D]
None of the above
Answer: c. resistance is low
(8)
In practice, voltage gain is expressed ……………
[A]
In db
[B]
In volts
[C]
As a number
[D]
None of the above
(9)
………….. coupling provides the maximum voltage gain
[A]
RC
[B]
Transformer
[C]
Direct
[D]
Impedance
(10)
When a multistage amplifier is to amplify d.c. signal, then one must use …….. coupling
[A]
RC
[B]
Transformer
[C]
Direct
[D]
None of the above
(11)
The noise factor of an ideal amplifier expressed in db is …………..
[A]
0
[B]
1
[C]
10
[D]
None of the above
(12)
In RC coupling, the value of coupling capacitor is about ……….
[A]
100 pF
[B]
0.1 µF
[C]
0.01 µF
[D]
10 µF
(13)
In an RC coupling scheme, the coupling capacitor CC must be large enough ………..
[A]
To pass d.c. between the stages
[B]
Not to attenuate the low frequencies
[C]
To dissipate high power
[D]
None of the above
Answer: Not to attenuate the low frequencies
(14)
Transformer coupling is used for ………….. amplification
[A]
Power
[B]
Voltage
[C]
Current
[D]
None of the above
(15)
The best frequency response is of ………. coupling
[A]
RC
[B]
Transformer
[C]
Direct
[D]
None of the above
(16)
An advantage of RC coupling scheme is the ………….
[A]
Good impedance matching
[B]
Economy
[C]
High efficiency
[D]
None of the above
(17)
In obtaining the frequency response curve of an amplifier, the …………
[A]
Amplifier level output is kept constant
[B]
Amplifier frequency is held constant
[C]
Generator frequency is held constant
[D]
Generator output level is held constant
Answer: Generator output level is held constant
(18)
In an RC coupled amplifier, the voltage gain over mid-frequency range …………….
[A]
Changes abruptly with frequency
[B]
Is constant
[C]
Changes uniformly with frequency
[D]
None of the above
(19)
RC coupling is used for ………………. amplification
[A]
Voltage
[B]
Current
[C]
Power
[D]
None of the above
(20)
A radio receiver has …………… of amplification
[A]
One stage
[B]
Two stages
[C]
Three stages
[D]
More than one stages
Answer: More than one stages
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