Multi Stage Transistor Amplifier Question & AnswersNovember 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 loss1). In ______________ amplifier the voltage gain is less than unity Common emitter Common collector Common base Both b and c HintIn common collector and common base amplifier the voltage gain is less than unity2). In _________ amplifier the voltage gain is greater than unity Common emitter Common collector Common base Both b and c HintIn common emitter amplifier the voltage gain is greater than unity3). How many types of couplings are there in a single-stage transistor amplifier? One Two Three Four HintThere are four types of couplings are there they are resistance capacitance, impedance, transformer, and direct couplings4). Which one of the following couplings is used for voltage amplification? RC coupling Transformer Direct None of the above HintThe resistance-capacitance coupling is used for voltage amplification5). Which one of the following couplings is used for power amplification? RC coupling Transformer Direct None of the above HintThe transformer coupling is used for power amplification6). Which one of the following couplings is used for amplifying extremely low frequencies? RC coupling Transformer Direct None of the above HintThe direct coupling is used for amplifying extremely low frequencies7). The impedance matching is not good in _________________ coupling RC coupling Transformer Direct None of the above HintThe impedance matching is not good in resistance-capacitance coupling8). The impedance matching is excellent in _________________ coupling RC coupling Transformer Direct None of the above HintThe impedance matching is excellent in transformer coupling9). The Colpitts oscillators are used as __________________ RF oscillator In mobile applications As temperature sensor All of the above HintThe Colpitts oscillators are used as RF oscillators, used in mobile applications, and also used as the temperature sensor10). 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 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 temperature11). 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 HintThe hartley oscillators are used as RF oscillators, as a local oscillator in radio receivers, and to produce a sine wave of the desired frequency12). Which one of the following oscillators doesn't use capacitive feedback? Colpitts Hartley Clapp None of the above HintThe hartley oscillator doesn't use capacitive feedback13). The impedance matching is good in _________________ coupling RC coupling Transformer Direct None of the above HintThe impedance matching is good in direct coupling14). The frequency response is poor in _______________ coupling RC coupling Transformer Direct None of the above HintThe frequency response is poor in transformer coupling15). Which one of the following coupling costs is more? RC coupling Tansformer Direct None of the above HintThe transformer coupling cost is more compared to other couplings16). The space and weight is less in ______________ coupling RC coupling Transformer Direct None of the above HintThe space and weight is less in resistance capacitance coupling17). The electric oscillators are categorized into ________________ types One Four Six Three HintThe electric oscillators are categorized into six types they are sinusoidal, non-sinusoidal, tuned circuit, RC, crystal, and negative resistance oscillatorRead more about Oscillators18). 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 HintThe RC phase shift oscillators don't require transformers, it is used to provide very low frequencies and the circuit provides good frequency stability19). The frequency response is best in _______________ coupling RC coupling Transformer Direct None of the above HintThe frequency response is best in direct coupling20). Which one of the following coupling costs is less? RC coupling Transformer Direct None of the above HintThe resistance-capacitance coupling cost is less compared to other couplings21). The space and weight is more in ______________ coupling RC coupling Transformer Direct None of the above Hintspace and weight is more in transformer coupling22). 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 HintThe Wien bridge oscillator provides constant output, its circuit operation is quite easy, and the overall gain is high23). The LC oscillators are categorized into __________________ types One Four Six Three HintThe LC oscillators are categorized into three types they are hartley, Colpitts, and Clapp oscillator24). Which one of the following oscillators uses inductive feedback? Hartley Colpitts Clapp All of the above HintThe hartley oscillator uses inductive feedback25). Which one of the following uses capacitive feedback? Hartley Colpitts Clapp All of the above HintThe Colpitts uses capacitive feedback whereas the hartley doesn't useMultistage Transistor Amplifiers MCQ's for Interviews26). Which one of the following coupling costs is the least? RC coupling Transformer Direct None of the above HintThe direct coupling cost is least compared to other couplings27). The space and weight is least in ______________ coupling RC coupling Transformer Direct None of the above HintThe space and weight is least in direct coupling28). What are the disadvantages of LC oscillators? Waveform is poor Frequency instability Inductors are bulky and expensive All of the above HintIn LC oscillators the waveforms are poor, frequency is unstable, and the inductors are bulky and expensive29). ________________ are the factors that affects the frequency of an oscillator Power supply variations Changes in temperature Changes in load All of the above HintThe power supply variations, changes in temperature, and changes in load are the factors that affect the frequency of an oscillator30). 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 HintThe improvement in gain, improved Q-point, and the improved input and output impedance are the advantages of multistage amplifiers31). What are the disadvantages of multistage amplifiers? Bandwidth of multistage amplifier is low Circuit becomes complex Cost will increase All of the above HintThe bandwidth of the multistage amplifier is low, less space and weight, and the cost will increase32). What are the advantages of RC coupling? Simple network Cost-effective Less space and weight All of the above HintThe advantages of RC coupling is its network is simple, cost-effective, and the space and weight is less33). What are the disadvantages of RC coupling? Not good for impedance matching Not great gain Noise is high All of the above HintIn RC coupling the noise is high, and it is not good for impedance matching34). The efficiency is ________________ in class A amplifier 1% 20% 25% 100% 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 Zero 360 <180 90 HintThe angle of conduction is less than 180 degrees in class C amplifier36). The angle of conduction is ___________________ degree in class AB amplifier zero 360 More than 180 but less than 360 90 HintThe angle of conduction is more than 180 but less than 360 degrees in a class AB amplifier37). What are the disadvantages of direct coupling? Efficiency is very less Poor Q point stability Both a and b None of the above HintIn direct coupling the efficiency is very less and it has poor Q point stability38). What are the advantages of direct coupling? Cost-effective Simple circuit Good impedance matching and frequency response All of the above HintThe advantages of direct coupling are they are cost-effective, simple circuit, and has good impedance matching and frequency response39). What are the disadvantages of transformer coupling? Bulky Costly and require more space Frequency distortion is high All of the above HintThe disadvantages of transformer coupling are they are bulky, costly, and require more space, and the frequency by distortion is high40). The angle of conduction is ___________________ degree in class A amplifier zero 360 More than 180 but less than 360 90 HintThe angle of conduction is 360 degrees in class A amplifier41). The angle of conduction is ___________________ degree in class B amplifier zero 360 180 90 HintThe angle of conduction is 180 degree in class B amplifier42). The circuit efficiency is _________________ in class B amplifier 1% 20% 78.5% 100% HintThe circuit efficiency is 78.5% in class B amplifier43). The circuit efficiency is _________________ in class AB amplifier 1% 20% 78.5% 100% HintThe circuit efficiency is 78.5% in class AB amplifier44). The circuit efficiency is _________________ in class C amplifier 1% 20% 78.5% 95% HintThe circuit efficiency is 95% in class C amplifier45). 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 HintThe position of the operating point is exactly at the center of the load line in class A amplifier46). 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 HintThe position of the operating point is on the X-axis in the class B amplifier47). 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 HintThe distortions are minimum or no distortion in class A amplifier48). The distortions in class B amplifier are more than class ________________ amplifier Class A Class AB Both a and b None of the above HintThe distortions in class B amplifier are more than class A and class AB amplifiers49). The distortions in class B amplifier are less than class ________________ amplifier Class A Class AB Class C None of the above HintThe distortions in class B amplifier are less than class C amplifier50). 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 HintThe position of the operating point is below the X-axis in the class C amplifierMultistage Transistor Amplifiers MCQ's for Exams51). 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 HintThe position of the operating point is just above the X-axis in the class AB amplifier52). The collector coupled bistable multivibrator is categorized into _________________ types One Four Two Three HintThe collector coupled bistable multivibrator is categorized into two types they are fixed bias bistable multivibrator, and self bias bistable multivibrator53). The bistable multivibrators are categorized into _________________ types One Four Two Three HintThe bistable multivibrators are categorized into two types they are collector coupled bistable multivibrator and emitter-coupled bistable multivibrator54). Which one of the following amplifiers is used as an audio power amplifier? Class A Class B Class C Class AB HintThe class C amplifier is used as an audio power amplifier55). Which one of the following amplifiers is used as an RF amplifier? Class A Class B Class C Class AB HintThe class AB amplifier is used as an RF amplifier56). The class A amplifiers are used in _________________ amplifiers RF amplifiers Audio amplifiers Outdoor musical system All of the above HintThe class A amplifiers are used in RF amplifiers, audio amplifiers, and outdoor musical systems57). The distortions are maximum in ________________ amplifier Class A Class C Class AB HintThe distortions are maximum in class C amplifier58). The distortions in class AB amplifiers are more than __________________ amplifier Class A Class B Class C Class AB HintThe distortions in class AB amplifiers are more than class A amplifier59). The distortions in class AB amplifiers are less than __________________ amplifier Class A Class B Class C Both b and c HintThe distortions in class-AB amplifiers are less than class B and C amplifier60). The large signal tuned amplifiers are used to amplify ________________ signals Low-frequency signals Large RF signals Both a and b None of the above HintThe large signal tuned amplifiers are used to amplify large RF signals61). The small-signal tuned amplifiers are operated in ________________ mode Class A Class B Class C Both b and c HintThe small-signal tuned amplifiers are operated in class A mode62). The power output is more in ________________ tuned amplifier Small signal Large signal Both a and b None of the above HintThe power output is more in large-signal tuned amplifier63). The small-signal tuned amplifier are used to amplify __________________ signals High frequency Low frequency Very low frequency None of the above HintThe small signal tuned amplifier are used to amplify low frequency signals64). The small signal tuned amplifiers are categorized into ___________________ types One Four Two Three HintThe small-signal tuned amplifiers are categorized into three types they are single tuned, double-tuned, and staggered tuned amplifiers65). The power output is low in ________________ tuned amplifier Small signal Large signal Both a and b None of the above HintThe power output is low in small signal tuned amplifier66). The single tuned amplifiers are categorized as ______________________ types One Four Two Three HintThe single tuned amplifiers are categorized into two types they are capacitive coupled and transformer-coupled tuned amplifiers67). 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 HintThe ratio of susceptance of inductance or capacitance divided by the conductance of shunt resistance is known as Q effective equivalent Q factor68). How many types of astable multivibrators are there? One Four Two Three HintThere are two types of astable multivibrators are there they are, collector, coupled astable multivibrator, and emitter-coupled astable multivibrator69). The distortions are categorized into _____________________ types One Four Two Three HintThe distortions are categorized into four types they are non-linear, frequency, phase, and intermodulation distortions70). How many connections do feedback networks have? One Four Two Three HintThe feedback networks have three connections they are sampling, feedback, and mixer network71). 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 HintThe features of negative feedback amplifiers are overall gain and distortion is reduced, noise is reduced, bandwidth and stability is improved72). In which one of the following amplifiers the input voltage is low? Voltage Current Both a and b None of the above HintIn voltage amplifier the input voltage is low73). The collector current is low in _______________ amplifier Voltage Current Both a and b None of the above HintThe collector current is low in the voltage amplifier74). The average AC power output divided by average DC power input to transistor is known as ________________ efficiency Emitter Collector Base None of the above HintThe average AC power output divided by average DC power input to the transistor is known as collector efficiency75). The output impedance is low in __________________ amplifier Voltage Current Power None of the above HintThe output impedance is low in the power amplifierMultistage Transistor Amplifiers MCQ's for Quiz76). The input impedance in common base is from ________________ 10 to 20 ohms 20 to 30 ohms 50 to 200 ohms 1 to 2 ohms HintThe input impedance in the common base is from 50 to 200 ohms77). The large signal tuned amplifiers are operated in _________ modes Class B Class C or class AB Both a and b None of the above HintThe large signal tuned amplifiers are operated in class B, class C, or class AB modes78). Which one of the following is a type of small-signal tuned amplifier? Single Double Stagger All of the above HintThe single tuned amplifier, double-tuned amplifier, and the stagger tuned amplifier are the types of small-signal tuned amplifier79). 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 HintThe single tuned amplifier uses only one parallel tuned circuit80). 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 HintThe double-tuned amplifier uses two mutually coupled tuned circuits81). What are the advantages of tuned amplifiers? Has high selectivity Have small power loss Both a and b None of the above HintThe tuned amplifiers have high selectivity and low power loss82). Which one of the following is a type of multi-stage amplifier? Single Double Stagger All of the above HintThe stagger tuned amplifier is a type of multi-stage amplifier83). The output signal is not distorted in __________________ amplifier Class A Class B Class AB None of the above HintThe output signal is not distorted in class A amplifier84). The input impedance in common emitter is from ________________ 10 to 20 ohms 20 to 30 ohms 500 to 2000 ohms 1 to 2 ohms HintThe input impedance in the common-emitter is from 500 to 2000 ohms85). The transistor with high beta is used in _________________ amplifier Voltage Power Both a and b None of the above HintThe transistor with high beta is used in the voltage amplifier86). In which one of the following amplifiers the heat sink is not necessary? Voltage Power Both a and b None of the above HintIn voltage amplifier the heat sink is not necessary Read more about Amplifiers87). The current gain in common emitter is from _________________ 20 to 200 10 to 100 20 to 40 1 to 5200 HintThe current gain in the common-emitter is from 20 to 20088). The current gain in common base is from _________________ 20 to 200 10 to 100 20 to 40 <1 HintThe current gain in the common base is less than one89). The current gain in common collector is from _________________ 20 to 200 10 to 100 20 to 40 <1 HintThe current gain in the common collector is from 20 to 20090). The voltage gain is _________________ in common emitter 20 to 200 100 to 1000 20 to 40 <1 HintThe voltage gain is 100 to 1000 in the common-emitter91). The voltage gain is _________________ in the common base 20 to 200 100 to 1000 500 to 800 <1 HintThe voltage gain is 500 to 800 in common base92). The voltage gain is _________________ in the common collector 20 to 200 100 to 1000 500 to 800 <1 HintThe voltage gain is less than one in the common collector93). 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 HintThe output impedance in the common-emitter is from 10 K to 50 K ohms94). 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 HintThe output impedance in the common base is from 100 K to 1 M ohms95). The small size transistors are used in _______________ amplifier Voltage Power Both a and b None of the above HintThe small size transistors are used in the voltage amplifier96). The transistor with low beta is used in _________________ amplifier Voltage Power Both a and b None of the above HintThe transistor with low beta is used in type of power amplifier97). The power transistor size is large in _____________ amplifier Voltage Power Both a and b None of the above HintThe power transistor size is large in power amplifier98). 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 HintThe output impedance in the common collector is from 20 to 500 ohms99). The RC coupling is widely used in __________________ amplifier Voltage Power Both a and b None of the above HintThe RC coupling is widely used in voltage amplifier100). The transformer coupling is widely used in ________________ amplifier Voltage Power Both a and b None of the above HintThe transformer coupling is widely used in power amplifier Time is Up! Time's up
