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Free download in PDF Transistor Audio Power 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)
Low efficiency of a power amplifier results in ……………….
[A]
Low forward bias
[B]
Less battery consumption
[C]
More battery consumption
[D]
None of the above
Answer: More battery consumption
(2)
The size of a power transistor is made considerably large to …………
[A]
Provide easy handling
[B]
Dissipate heat
[C]
Facilitate connections
[D]
None of the above
(3)
The output stage of a multistage amplifier usually employs ………..
[A]
Push-pull amplifier
[B]
Preamplifier
[C]
Class A power amplifier
[D]
None of the above
Answer: Push-pull amplifier
(4)
Class ………….. operation gives the maximum distortion
(5)
A class A power amplifier is sometimes called ………….. amplifier
[A]
Symmetrical
[B]
Single-ended
[C]
Reciprocating
[D]
Differential
(6)
When a transistor is cut off……………..
[A]
Maximum voltage appears across transistor
[B]
Maximum current flows
[C]
Maximum voltage appears across load
[D]
None of the above
Answer: Maximum voltage appears across transistor
(7)
If the zero signal dissipation of a transistor is 1W, then power rating of the transistor should be at least ……………….
[A]
5 W
[B]
33 W
[C]
75 W
[D]
1 W
(8)
If a transistor is operated in such a way that output current flows for 60o of the input signal, then it is …………… operation
[A]
Class A
[B]
Class B
[C]
Class C
[D]
None of the above
(9)
A 2-transistor class B power amplifier is commonly called ……….. amplifier
[A]
Dual
[B]
Push-pull
[C]
Symmetrical
[D]
Differential
(10)
The maximum collector efficiency of class B operation is ……………..
[A]
50%
[B]
90%
[C]
5%
[D]
5%
(11)
A power amplifier has comparatively …………….. ß
[A]
Small
[B]
Large
[C]
Very large
[D]
None of the above
(12)
Class C amplifiers are used as …………….
[A]
AF amplifiers
[B]
Detectors
[C]
F. amplifiers
[D]
None of the above
(13)
In class A operation, the operating point is generally located ………. of the d.c. load line.
[A]
At cut off point
[B]
At the middle
[C]
At saturation point
[D]
None of the above
(14)
Power amplifiers handle …………. signals compare to voltage amplifiers
[A]
Small
[B]
Very small
[C]
Large
[D]
None of the above
(15)
Class……. power amplifier has the highest collector efficiency
(16)
The maximum efficiency of transformer coupled class A power amplifier is ………………
[A]
30%
[B]
50%
[C]
80%
[D]
45%
(17)
The maximum efficiency of resistance loaded class A power amplifier is ……..
[A]
5%
[B]
50%
[C]
30%
[D]
25%
(18)
A class A power amplifier uses …………
[A]
Two transistors
[B]
Three transistors
[C]
One transistor
[D]
None of the above
(19)
………………. coupling is generally employed in power amplifiers
[A]
Transformer
[B]
RC
[C]
direct
[D]
Impedance
(20)
The output stage of a multistage amplifier is also called ……………
[A]
Mixer stage
[B]
Power stage
[C]
Detector stage
[D]
F stage
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