Multistage Transistor Amplifier Quiz | Multistage Transistor Amplifier Multiple Choice Questions and Answers

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Questions
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

Answer: Step down
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
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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

Answer: 27 db
6 Transformer coupling is generally employed when load resistance is ………
A Large
B Very large
C Small
D None of the above

Answer: Small
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

Answer: In db
9 ………….. coupling provides the maximum voltage gain
A RC
B Transformer
C Direct
D Impedance

Answer: Transformer
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

Answer: Direct
11 The noise factor of an ideal amplifier expressed in db is …………..
A 0
B 1
C 10
D None of the above

Answer: 0
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

Answer: 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

Answer: Power
15 The best frequency response is of ………. coupling
A RC
B Transformer
C Direct
D None of the above

Answer: Direct
16 An advantage of RC coupling scheme is the ………….
A Good impedance matching
B Economy
C High efficiency
D None of the above

Answer: Economy
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

Answer: Is constant
19 RC coupling is used for ………………. amplification
A Voltage
B Current
C Power
D None of the above

Answer: Voltage
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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