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 Common emitter Common collector Common base Both b and c None Hint 2). In _________ amplifier the voltage gain is greater than unity Common emitter Common collector Common base Both b and c None Hint 3). How many types of couplings are there in a single-stage transistor amplifier? One Two Three Four None Hint 4). Which one of the following couplings is used for voltage amplification? RC coupling Transformer Direct None of the above None Hint 5). Which one of the following couplings is used for power amplification? RC coupling Transformer Direct None of the above None Hint 6). Which one of the following couplings is used for amplifying extremely low frequencies? RC coupling Transformer Direct None of the above None Hint 7). The impedance matching is not good in _________________ coupling RC coupling Transformer Direct None of the above None Hint 8). The impedance matching is excellent in _________________ coupling RC coupling Transformer Direct None of the above None Hint 9). The Colpitts oscillators are used as __________________ RF oscillator In mobile applications As temperature sensor All of the above None Hint 10). What are the advantages of Colpitts oscillators? Frequency stability is high Less number of components is sufficient It can withstand high and low-temperature All of the above None Hint 11). The hartley oscillators are used as ________________ oscillator RF oscillator Local oscillator in radio receivers To produce a sine wave of the desired frequency All of the above None Hint 12). Which one of the following oscillators doesn't use capacitive feedback? Colpitts Hartley Clapp None of the above None Hint 13). The impedance matching is good in _________________ coupling RC coupling Transformer Direct None of the above None Hint 14). The frequency response is poor in _______________ coupling RC coupling Transformer Direct None of the above None Hint 15). Which one of the following coupling costs is more? RC coupling Tansformer Direct None of the above None Hint 16). The space and weight is less in ______________ coupling RC coupling Transformer Direct None of the above None Hint 17). The electric oscillators are categorized into ________________ types One Four Six Three None Hint Read more about Oscillators 18). What are the advantages of the RC phase shift oscillator? Doesn't require transformers Circuit provides good frequency stability Used to provide very low frequencies All of the above None Hint 19). The frequency response is best in _______________ coupling RC coupling Transformer Direct None of the above None Hint 20). Which one of the following coupling costs is less? RC coupling Transformer Direct None of the above None Hint 21). The space and weight is more in ______________ coupling RC coupling Transformer Direct None of the above None Hint 22). What are the advantages of the Wien bridge oscillator? Provides constant output Operation of the circuit is a quite easy Overall gain is high All of the above None Hint 23). The LC oscillators are categorized into __________________ types One Four Six Three None Hint 24). Which one of the following oscillators uses inductive feedback? Hartley Colpitts Clapp All of the above None Hint 25). Which one of the following uses capacitive feedback? Hartley Colpitts Clapp All of the above None Hint Multistage Transistor Amplifiers MCQ's for Interviews 26). Which one of the following coupling costs is the least? RC coupling Transformer Direct None of the above None Hint 27). The space and weight is least in ______________ coupling RC coupling Transformer Direct None of the above None Hint 28). What are the disadvantages of LC oscillators? Waveform is poor Frequency instability Inductors are bulky and expensive All of the above None Hint 29). ________________ are the factors that affects the frequency of an oscillator Power supply variations Changes in temperature Changes in load All of the above None Hint 30). What are the advantages of multistage amplifiers? Improvement in gain We will get improved Q-point We will get improved input and output impedance All of the above None Hint 31). What are the disadvantages of multistage amplifiers? Bandwidth of multistage amplifier is low Circuit becomes complex Cost will increase All of the above None Hint 32). What are the advantages of RC coupling? Simple network Cost-effective Less space and weight All of the above None Hint 33). What are the disadvantages of RC coupling? Not good for impedance matching Not great gain Noise is high All of the above None Hint 34). The efficiency is ________________ in class A amplifier 1% 20% 25% 100% None Hint 35). The angle of conduction is ___________________ degree in class C amplifier Zero 360 <180 90 None Hint 36). The angle of conduction is ___________________ degree in class AB amplifier zero 360 More than 180 but less than 360 90 None Hint 37). What are the disadvantages of direct coupling? Efficiency is very less Poor Q point stability Both a and b None of the above None Hint 38). What are the advantages of direct coupling? Cost-effective Simple circuit Good impedance matching and frequency response All of the above None Hint 39). What are the disadvantages of transformer coupling? Bulky Costly and require more space Frequency distortion is high All of the above None Hint 40). The angle of conduction is ___________________ degree in class A amplifier zero 360 More than 180 but less than 360 90 None Hint 41). The angle of conduction is ___________________ degree in class B amplifier zero 360 180 90 None Hint 42). The circuit efficiency is _________________ in class B amplifier 1% 20% 78.5% 100% None Hint 43). The circuit efficiency is _________________ in class AB amplifier 1% 20% 78.5% 100% None Hint 44). The circuit efficiency is _________________ in class C amplifier 1% 20% 78.5% 95% None Hint 45). The position of operating point is __________ in class A amplifier Exactly at the center of the load line On X-axis Just above X-axis Below X-axis None Hint 46). The position of operating point is __________ in class B amplifier Exactly at the center of the load line On X-axis Just above X-axis Below X-axis None Hint 47). The distortions are ________________ in class A amplifier Minimum or no distortion Distortions are more than class C Distortions are more than class AB None of the above None Hint 48). The distortions in class B amplifier are more than class ________________ amplifier Class A Class AB Both a and b None of the above None Hint 49). The distortions in class B amplifier are less than class ________________ amplifier Class A Class AB Class C None of the above None Hint 50). The position of operating point is __________ in class C amplifier Exactly at the center of the load line On X-axis Just above X-axis Below X-axis None Hint Multistage Transistor Amplifiers MCQ's for Exams 51). The position of operating point is __________ in class AB amplifier Exactly at the center of the load line On X-axis Just above the X-axis Below X-axis None Hint 52). The collector coupled bistable multivibrator is categorized into _________________ types One Four Two Three None Hint 53). The bistable multivibrators are categorized into _________________ types One Four Two Three None Hint 54). Which one of the following amplifiers is used as an audio power amplifier? Class A Class B Class C Class AB None Hint 55). Which one of the following amplifiers is used as an RF amplifier? Class A Class B Class C Class AB None Hint 56). The class A amplifiers are used in _________________ amplifiers RF amplifiers Audio amplifiers Outdoor musical system All of the above None Hint 57). The distortions are maximum in ________________ amplifier Class A Class C Class AB None Hint 58). The distortions in class AB amplifiers are more than __________________ amplifier Class A Class B Class C Class AB None Hint 59). The distortions in class AB amplifiers are less than __________________ amplifier Class A Class B Class C Both b and c None Hint 60). The large signal tuned amplifiers are used to amplify ________________ signals Low-frequency signals Large RF signals Both a and b None of the above None Hint 61). The small-signal tuned amplifiers are operated in ________________ mode Class A Class B Class C Both b and c None Hint 62). The power output is more in ________________ tuned amplifier Small signal Large signal Both a and b None of the above None Hint 63). The small-signal tuned amplifier are used to amplify __________________ signals High frequency Low frequency Very low frequency None of the above None Hint 64). The small signal tuned amplifiers are categorized into ___________________ types One Four Two Three None Hint 65). The power output is low in ________________ tuned amplifier Small signal Large signal Both a and b None of the above None Hint 66). The single tuned amplifiers are categorized as ______________________ types One Four Two Three None Hint 67). The ratio of susceptance of inductance or capacitance divided by the conductance of shunt resistance is known as _______________ Q effective equivalent Q factor Overall gain Power gain None of the above None Hint 68). How many types of astable multivibrators are there? One Four Two Three None Hint 69). The distortions are categorized into _____________________ types One Four Two Three None Hint 70). How many connections do feedback networks have? One Four Two Three None Hint 71). What are the features of negative feedback amplifiers? Overall gain and distortion is reduced Noise is reduced Bandwidth and stability is improved All of the above None Hint 72). In which one of the following amplifiers the input voltage is low? Voltage Current Both a and b None of the above None Hint 73). The collector current is low in _______________ amplifier Voltage Current Both a and b None of the above None Hint 74). The average AC power output divided by average DC power input to transistor is known as ________________ efficiency Emitter Collector Base None of the above None Hint 75). The output impedance is low in __________________ amplifier Voltage Current Power None of the above None Hint Multistage Transistor Amplifiers MCQ's for Quiz 76). The input impedance in common base is from ________________ 10 to 20 ohms 20 to 30 ohms 50 to 200 ohms 1 to 2 ohms None Hint 77). The large signal tuned amplifiers are operated in _________ modes Class B Class C or class AB Both a and b None of the above None Hint 78). Which one of the following is a type of small-signal tuned amplifier? Single Double Stagger All of the above None Hint 79). Which one of the following tuned amplifiers uses only one parallel tuned circuit? Single tuned amplifier Double tuned amplifier Stagger tuned amplifier All of the above None Hint 80). Which one of the following tuned amplifiers uses two mutually coupled tuned circuits? Single tuned amplifier Double tuned amplifier Stagger tuned amplifier All of the above None Hint 81). What are the advantages of tuned amplifiers? Has high selectivity Have small power loss Both a and b None of the above None Hint 82). Which one of the following is a type of multi-stage amplifier? Single Double Stagger All of the above None Hint 83). The output signal is not distorted in __________________ amplifier Class A Class B Class AB None of the above None Hint 84). The input impedance in common emitter is from ________________ 10 to 20 ohms 20 to 30 ohms 500 to 2000 ohms 1 to 2 ohms None Hint 85). The transistor with high beta is used in _________________ amplifier Voltage Power Both a and b None of the above None Hint 86). In which one of the following amplifiers the heat sink is not necessary? Voltage Power Both a and b None of the above None Hint Read more about Amplifiers 87). The current gain in common emitter is from _________________ 20 to 200 10 to 100 20 to 40 1 to 5200 None Hint 88). The current gain in common base is from _________________ 20 to 200 10 to 100 20 to 40 <1 None Hint 89). The current gain in common collector is from _________________ 20 to 200 10 to 100 20 to 40 <1 None Hint 90). The voltage gain is _________________ in common emitter 20 to 200 100 to 1000 20 to 40 <1 None Hint 91). The voltage gain is _________________ in the common base 20 to 200 100 to 1000 500 to 800 <1 None Hint 92). The voltage gain is _________________ in the common collector 20 to 200 100 to 1000 500 to 800 <1 None Hint 93). The output impedance in common emitter is from ____________ 10 K to 50 K ohms 100 K to 500 K ohms 1 K to 50 K ohms 0.5 K to 50 K ohms None Hint 94). The output impedance in the common-emitter is from 10 K to 50 K ohms 10 K to 50 K ohms 100 K to 1 M ohms 1 K to 50 K ohms 0.5 K to 50 K ohms None Hint 95). The small size transistors are used in _______________ amplifier Voltage Power Both a and b None of the above None Hint 96). The transistor with low beta is used in _________________ amplifier Voltage Power Both a and b None of the above None Hint 97). The power transistor size is large in _____________ amplifier Voltage Power Both a and b None of the above None Hint 98). The output impedance in common collector is from ____________ 20 to 500 ohms 100 K to 500 K ohms 1 K to 50 K ohms 0.5 K to 50 K ohms None Hint 99). The RC coupling is widely used in __________________ amplifier Voltage Power Both a and b None of the above None Hint 100). The transformer coupling is widely used in ________________ amplifier Voltage Power Both a and b None of the above None Hint Time's up
