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Multi Stage Transistor Amplifier Question & Answers

November 2, 2021 By WatElectronics

This article lists 100 Multi-Stage Transistor Amplifier MCQs for Engineering Students. All the Multi-Stage Transistor Amplifier Questions & Answers given below includes solution and link wherever possible to the relevant topic.

The multistage transistor amplifier circuit has more than one transistor with associated circuitry. The RC coupling, transformer coupling, and direct coupling are the type of couplings in a multistage transistor amplifier. The increase in gain and change in bandwidth are the advantages of multistage transistor amplifiers.

In common collector and common base amplifier, the voltage gain is less than unity whereas in common emitter amplifier the voltage gain is greater than unity. There are four types of couplings they are resistance-capacitance, impedance, transformer, and direct couplings.

The resistance-capacitance coupling is used for voltage amplification, transformer coupling is used for power amplification, direct coupling is used for amplifying extremely low frequencies. The improvement in gain improved Q-point, and the improved input and output impedance are the advantages of the multi-stage amplifier.

The single tuned amplifier, double-tuned amplifier, and stagger tuned amplifier are the types of small-signal tuned amplifier. The small-signal tuned amplifiers are used to amplify low-frequency signals whereas the single tuned amplifier uses only one parallel tuned circuit, the double-tuned amplifier uses two mutually coupled tuned circuits, and the large-signal tuned amplifiers are operated in class B, class C, or class AB modes and the advantages of this tuned amplifiers are they have high selectivity and low power loss

1). In ______________ amplifier the voltage gain is less than unity
HintIn common collector and common base amplifier the voltage gain is less than unity
2). In _________ amplifier the voltage gain is greater than unity
HintIn common emitter amplifier the voltage gain is greater than unity
3). How many types of couplings are there in a single-stage transistor amplifier?
HintThere are four types of couplings are there they are resistance capacitance, impedance, transformer, and direct couplings
4). Which one of the following couplings is used for voltage amplification?
HintThe resistance-capacitance coupling is used for voltage amplification
5). Which one of the following couplings is used for power amplification?
HintThe transformer coupling is used for power amplification
6). Which one of the following couplings is used for amplifying extremely low frequencies?
HintThe direct coupling is used for amplifying extremely low frequencies
7). The impedance matching is not good in _________________ coupling
HintThe impedance matching is not good in resistance-capacitance coupling
8). The impedance matching is excellent in _________________ coupling
HintThe impedance matching is excellent in transformer coupling
9). The Colpitts oscillators are used as __________________
HintThe Colpitts oscillators are used as RF oscillators, used in mobile applications, and also used as the temperature sensor
10). What are the advantages of Colpitts oscillators?
HintThe advantages of Colpitts oscillators is the frequency stability is high, has less number of components are sufficient, and it can withstand high and low temperature
11). The hartley oscillators are used as ________________ oscillator
HintThe hartley oscillators are used as RF oscillators, as a local oscillator in radio receivers, and to produce a sine wave of the desired frequency
12). Which one of the following oscillators doesn't use capacitive feedback?
HintThe hartley oscillator doesn't use capacitive feedback
13). The impedance matching is good in _________________ coupling
HintThe impedance matching is good in direct coupling
14). The frequency response is poor in _______________ coupling
HintThe frequency response is poor in transformer coupling
15). Which one of the following coupling costs is more?
HintThe transformer coupling cost is more compared to other couplings
16). The space and weight is less in ______________ coupling
HintThe space and weight is less in resistance capacitance coupling
17). The electric oscillators are categorized into ________________ types
HintThe electric oscillators are categorized into six types they are sinusoidal, non-sinusoidal, tuned circuit, RC, crystal, and negative resistance oscillator

Read more about Oscillators

18). What are the advantages of the RC phase shift oscillator?
HintThe RC phase shift oscillators don't require transformers, it is used to provide very low frequencies and the circuit provides good frequency stability
19). The frequency response is best in _______________ coupling
HintThe frequency response is best in direct coupling
20). Which one of the following coupling costs is less?
HintThe resistance-capacitance coupling cost is less compared to other couplings
21). The space and weight is more in ______________ coupling
Hintspace and weight is more in transformer coupling
22). What are the advantages of the Wien bridge oscillator?
HintThe Wien bridge oscillator provides constant output, its circuit operation is quite easy, and the overall gain is high
23). The LC oscillators are categorized into __________________ types
HintThe LC oscillators are categorized into three types they are hartley, Colpitts, and Clapp oscillator
24). Which one of the following oscillators uses inductive feedback?
HintThe hartley oscillator uses inductive feedback
25). Which one of the following uses capacitive feedback?
HintThe Colpitts uses capacitive feedback whereas the hartley doesn't use

Multistage Transistor Amplifiers MCQ's for Interviews

26). Which one of the following coupling costs is the least?
HintThe direct coupling cost is least compared to other couplings
27). The space and weight is least in ______________ coupling
HintThe space and weight is least in direct coupling
28). What are the disadvantages of LC oscillators?
HintIn LC oscillators the waveforms are poor, frequency is unstable, and the inductors are bulky and expensive
29). ________________ are the factors that affects the frequency of an oscillator
HintThe power supply variations, changes in temperature, and changes in load are the factors that affect the frequency of an oscillator
30). What are the advantages of multistage amplifiers?
HintThe improvement in gain, improved Q-point, and the improved input and output impedance are the advantages of multistage amplifiers
31). What are the disadvantages of multistage amplifiers?
HintThe bandwidth of the multistage amplifier is low, less space and weight, and the cost will increase
32). What are the advantages of RC coupling?
HintThe advantages of RC coupling is its network is simple, cost-effective, and the space and weight is less
33). What are the disadvantages of RC coupling?
HintIn RC coupling the noise is high, and it is not good for impedance matching
34). The efficiency is ________________ in class A amplifier
HintThe efficiency is 25% in class A amplifier but if we change the coupling the efficiency can extend up to 50%
35). The angle of conduction is ___________________ degree in class C amplifier
HintThe angle of conduction is less than 180 degrees in class C amplifier
36). The angle of conduction is ___________________ degree in class AB amplifier
HintThe angle of conduction is more than 180 but less than 360 degrees in a class AB amplifier
37). What are the disadvantages of direct coupling?
HintIn direct coupling the efficiency is very less and it has poor Q point stability
38). What are the advantages of direct coupling?
HintThe advantages of direct coupling are they are cost-effective, simple circuit, and has good impedance matching and frequency response
39). What are the disadvantages of transformer coupling?
HintThe disadvantages of transformer coupling are they are bulky, costly, and require more space, and the frequency by distortion is high
40). The angle of conduction is ___________________ degree in class A amplifier
HintThe angle of conduction is 360 degrees in class A amplifier
41). The angle of conduction is ___________________ degree in class B amplifier
HintThe angle of conduction is 180 degree in class B amplifier
42). The circuit efficiency is _________________ in class B amplifier
HintThe circuit efficiency is 78.5% in class B amplifier
43). The circuit efficiency is _________________ in class AB amplifier
HintThe circuit efficiency is 78.5% in class AB amplifier
44). The circuit efficiency is _________________ in class C amplifier
HintThe circuit efficiency is 95% in class C amplifier
45). The position of operating point is __________ in class A amplifier
HintThe position of the operating point is exactly at the center of the load line in class A amplifier
46). The position of operating point is __________ in class B amplifier
HintThe position of the operating point is on the X-axis in the class B amplifier
47). The distortions are ________________ in class A amplifier
HintThe distortions are minimum or no distortion in class A amplifier
48). The distortions in class B amplifier are more than class ________________ amplifier
HintThe distortions in class B amplifier are more than class A and class AB amplifiers
49). The distortions in class B amplifier are less than class ________________ amplifier
HintThe distortions in class B amplifier are less than class C amplifier
50). The position of operating point is __________ in class C amplifier
HintThe position of the operating point is below the X-axis in the class C amplifier

Multistage Transistor Amplifiers MCQ's for Exams

51). The position of operating point is __________ in class AB amplifier
HintThe position of the operating point is just above the X-axis in the class AB amplifier
52). The collector coupled bistable multivibrator is categorized into _________________ types
HintThe collector coupled bistable multivibrator is categorized into two types they are fixed bias bistable multivibrator, and self bias bistable multivibrator
53). The bistable multivibrators are categorized into _________________ types
HintThe bistable multivibrators are categorized into two types they are collector coupled bistable multivibrator and emitter-coupled bistable multivibrator
54). Which one of the following amplifiers is used as an audio power amplifier?
HintThe class C amplifier is used as an audio power amplifier
55). Which one of the following amplifiers is used as an RF amplifier?
HintThe class AB amplifier is used as an RF amplifier
56). The class A amplifiers are used in _________________ amplifiers
HintThe class A amplifiers are used in RF amplifiers, audio amplifiers, and outdoor musical systems
57). The distortions are maximum in ________________ amplifier
HintThe distortions are maximum in class C amplifier
58). The distortions in class AB amplifiers are more than __________________ amplifier
HintThe distortions in class AB amplifiers are more than class A amplifier
59). The distortions in class AB amplifiers are less than __________________ amplifier
HintThe distortions in class-AB amplifiers are less than class B and C amplifier
60). The large signal tuned amplifiers are used to amplify ________________ signals
HintThe large signal tuned amplifiers are used to amplify large RF signals
61). The small-signal tuned amplifiers are operated in ________________ mode
HintThe small-signal tuned amplifiers are operated in class A mode
62). The power output is more in ________________ tuned amplifier
HintThe power output is more in large-signal tuned amplifier
63). The small-signal tuned amplifier are used to amplify __________________ signals
HintThe small signal tuned amplifier are used to amplify low frequency signals
64). The small signal tuned amplifiers are categorized into ___________________ types
HintThe small-signal tuned amplifiers are categorized into three types they are single tuned, double-tuned, and staggered tuned amplifiers
65). The power output is low in ________________ tuned amplifier
HintThe power output is low in small signal tuned amplifier
66). The single tuned amplifiers are categorized as ______________________ types
HintThe single tuned amplifiers are categorized into two types they are capacitive coupled and transformer-coupled tuned amplifiers
67). The ratio of susceptance of inductance or capacitance divided by the conductance of shunt resistance is known as _______________
HintThe ratio of susceptance of inductance or capacitance divided by the conductance of shunt resistance is known as Q effective equivalent Q factor
68). How many types of astable multivibrators are there?
HintThere are two types of astable multivibrators are there they are, collector, coupled astable multivibrator, and emitter-coupled astable multivibrator
69). The distortions are categorized into _____________________ types
HintThe distortions are categorized into four types they are non-linear, frequency, phase, and intermodulation distortions
70). How many connections do feedback networks have?
HintThe feedback networks have three connections they are sampling, feedback, and mixer network
71). What are the features of negative feedback amplifiers?
HintThe features of negative feedback amplifiers are overall gain and distortion is reduced, noise is reduced, bandwidth and stability is improved
72). In which one of the following amplifiers the input voltage is low?
HintIn voltage amplifier the input voltage is low
73). The collector current is low in _______________ amplifier
HintThe collector current is low in the voltage amplifier
74). The average AC power output divided by average DC power input to transistor is known as ________________ efficiency
HintThe average AC power output divided by average DC power input to the transistor is known as collector efficiency
75). The output impedance is low in __________________ amplifier
HintThe output impedance is low in the power amplifier

Multistage Transistor Amplifiers MCQ's for Quiz

76). The input impedance in common base is from ________________
HintThe input impedance in the common base is from 50 to 200 ohms
77). The large signal tuned amplifiers are operated in _________ modes
HintThe large signal tuned amplifiers are operated in class B, class C, or class AB modes
78). Which one of the following is a type of small-signal tuned amplifier?
HintThe single tuned amplifier, double-tuned amplifier, and the stagger tuned amplifier are the types of small-signal tuned amplifier
79). Which one of the following tuned amplifiers uses only one parallel tuned circuit?
HintThe single tuned amplifier uses only one parallel tuned circuit
80). Which one of the following tuned amplifiers uses two mutually coupled tuned circuits?
HintThe double-tuned amplifier uses two mutually coupled tuned circuits
81). What are the advantages of tuned amplifiers?
HintThe tuned amplifiers have high selectivity and low power loss
82). Which one of the following is a type of multi-stage amplifier?
HintThe stagger tuned amplifier is a type of multi-stage amplifier
83). The output signal is not distorted in __________________ amplifier
HintThe output signal is not distorted in class A amplifier
84). The input impedance in common emitter is from ________________
HintThe input impedance in the common-emitter is from 500 to 2000 ohms
85). The transistor with high beta is used in _________________ amplifier
HintThe transistor with high beta is used in the voltage amplifier
86). In which one of the following amplifiers the heat sink is not necessary?
HintIn voltage amplifier the heat sink is not necessary
Read more about Amplifiers
87). The current gain in common emitter is from _________________
HintThe current gain in the common-emitter is from 20 to 200
88). The current gain in common base is from _________________
HintThe current gain in the common base is less than one
89). The current gain in common collector is from _________________
HintThe current gain in the common collector is from 20 to 200
90). The voltage gain is _________________ in common emitter
HintThe voltage gain is 100 to 1000 in the common-emitter
91). The voltage gain is _________________ in the common base
HintThe voltage gain is 500 to 800 in common base
92). The voltage gain is _________________ in the common collector
HintThe voltage gain is less than one in the common collector
93). The output impedance in common emitter is from ____________
HintThe output impedance in the common-emitter is from 10 K to 50 K ohms
94). The output impedance in the common-emitter is from 10 K to 50 K ohms
HintThe output impedance in the common base is from 100 K to 1 M ohms
95). The small size transistors are used in _______________ amplifier
HintThe small size transistors are used in the voltage amplifier
96). The transistor with low beta is used in _________________ amplifier
HintThe transistor with low beta is used in type of power amplifier
97). The power transistor size is large in _____________ amplifier
HintThe power transistor size is large in power amplifier
98). The output impedance in common collector is from ____________
HintThe output impedance in the common collector is from 20 to 500 ohms
99). The RC coupling is widely used in __________________ amplifier
HintThe RC coupling is widely used in voltage amplifier
100). The transformer coupling is widely used in ________________ amplifier
HintThe transformer coupling is widely used in power amplifier
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