Transistor Audio Power Amplifier Quiz | Transistor Audio Power Amplifier Multiple Choice Questions and Answers

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Questions
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

Answer: Dissipate heat
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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
A A
B B
C C
D AB

Answer: C
5 A class A power amplifier is sometimes called ………….. amplifier
A Symmetrical
B Single-ended
C Reciprocating
D Differential

Answer: Single-ended
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

Answer: 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

Answer: Class C
9 A 2-transistor class B power amplifier is commonly called ……….. amplifier
A Dual
B Push-pull
C Symmetrical
D Differential

Answer: Push-pull
10 The maximum collector efficiency of class B operation is ……………..
A 50%
B 90%
C 5%
D 5%

Answer: 5%
11 A power amplifier has comparatively …………….. ß
A Small
B Large
C Very large
D None of the above

Answer: Small
12 Class C amplifiers are used as …………….
A AF amplifiers
B Detectors
C F. amplifiers
D None of the above

Answer: F. amplifiers
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

Answer: At the middle
14 Power amplifiers handle …………. signals compare to voltage amplifiers
A Small
B Very small
C Large
D None of the above

Answer: Large
15 Class……. power amplifier has the highest collector efficiency
A C
B A
C B
D AB

Answer: C
16 The maximum efficiency of transformer coupled class A power amplifier is ………………
A 30%
B 50%
C 80%
D 45%

Answer: 50%
17 The maximum efficiency of resistance loaded class A power amplifier is ……..
A 5%
B 50%
C 30%
D 25%

Answer: 25%
18 A class A power amplifier uses …………
A Two transistors
B Three transistors
C One transistor
D None of the above

Answer: One transistor
19 ………………. coupling is generally employed in power amplifiers
A Transformer
B RC
C direct
D Impedance

Answer: Transformer
20 The output stage of a multistage amplifier is also called ……………
A Mixer stage
B Power stage
C Detector stage
D F stage

Answer: Power stage

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