Transistor Tuned Amplifiers Question & AnswersNovember 2, 2021 By WatElectronics This article lists 100 Transistor Tuned Amplifiers MCQs for Engineering Students. All the Transistor Tuned Amplifiers Questions & Answers given below includes solution and link wherever possible to the relevant topic.The amplifier is a piece of digital equipment whose function is to enhance the digital current, voltage, and power levels of a signal in digital communication. They are classified into three types single, double, and stager tuned amplifiers. An amplifier in which load is replaced with a tuned circuit is called a tuned amplifier. The frequency selection of a tuned amplifier is performed by choosing out from the available frequencies by tuning the amplifiers to various frequencies.An amplifier section with a uni section of the tuner at the collector terminal of the amplifier is called a single tuned amplifier. Whereas a double-tuned amplifier has two tuners at the collector terminal of the amplifier is called a double-tuned amplifier. Whereas a stagger stunned amplifier consists of three amplifiers. These amplifiers lack in terms of a small product of BW gain. They benefit in terms of high selectivity, small supply voltage, and less power loss. These tuned amplifiers are used in a large variety of applications like in television, radio receiver, wireless communication, RF amplifier, etc.1). Tuned amplifiers are classified in to _____ types? 2 3 4 5 HintTuned amplifiers are classified in to 3 types namely single, double and stager tuned amplifiers. Read more about stagger tuned amplifier.2). A single tuned amplifier contains ___ number of tuner sections? 1 2 3 0 HintA single tuned amplifier contains single tuner sections.3). Which of the following are the components involved in single tuned amplifier? Resistors Capacitors Inductors All the above HintThe components involved in a single tuned amplifier include resistors, capacitors and inductors. Read more about resistor.4). At which of the following component of single tuned amplifier output is obtained? Resistor Capacitor Coupling capacitor Inductor HintThe component of single tuned amplifier output is obtained either from secondary winding or from coupling capacitor.5). What is the value of frequency applied to single tuned amplifier? High Low Medium Both a and b HintA high value of frequency applied to single tuned amplifier.6). What is the value of impedance, in single tuned amplifier when resonate frequency and applied signals frequency are made equal? High Low Zero Constant HintThe value of impedance is high, in a single tuned amplifier when resonate frequency and applied signals frequency are made equal7). What is the purpose of amplifier? Tuning Selecting Clipping Both a and b HintAn amplifier is used for selecting and tuning.8). A tuned amplifier is also called as________? Tuned amplifier LC circuit Tank circuit All the above HintA tuned amplifier is also called as tuned amplifier, resonant circuit, tank circuit and LC circuit.9). Identify the formula of resonant frequency for single tuned amplifier? Fr= [1\2π sqrt{LC}] Fr= [1\2π sqrt{LC}2] Fr= [1\2π {LC}] Fr= [1\π sqrt{LC}] HintThe formula of resonant frequency for single tuned amplifier is Fr= [1\2π sqrt{LC}].10). A single tuned amplifier, is an example of ___ transistor configuration? CE CC CB All the above HintA single tuned amplifier, is an example of common emitter transistor configuration.11). Which of the following circuit in single tuned amplifier amplifies signal? RLC LC RC RL HintAn LC circuit in single tuned amplifier amplifies signal.12). What is the value of voltage gain of single tuned LC circuit? Av=B Rac/rin Av=B Rac*rin Av=B Rac+rin Both a and b HintThe value of voltage gain of single tuned LC circuit Av=B Rac/rin.13). What is the value of Rac in a single tuned amplifier? L/CR R/LC R+LC R/L+C HintThe value of Rac in a single tuned amplifier is L/CR.14). What is the value of bandwidth of a single tuned amplifier? BW=f2-f1 BW=f1+f2 BW=f1/f2 BW=f1*f2 HintThe value of Rac in a single tuned amplifier BW=f2-f1. Where f1-high value frequency and f2-low value frequency.15). What happens to the value of bandwidth when there is increase in voltage gain? Increases Decreases Constant Zero HintThe value of bandwidth decreases when there is increase in voltage gain.16). Which of the following are the advantages provided by single tuned amplifier? High selectivity Small supply voltage Less power loss All the above HintThe advantages provided by single tuned amplifier high selectivity, small supply voltage and less power loss.17). Which of the following are the disadvantages experienced by single tuned amplifier? Bandwidth is small High selectivity High power loss All the above HintThe disadvantages experienced by single tuned amplifier is bandwidth is small.18). Which of the following are the applications of single tuned amplifier? Television Radio receiver RF amplifier All the above HintThe applications of single tuned amplifier is television, radio receiver and RF amplifier.19). A which of the following filtering component is used in tuned amplifier? Bandpass Side pass High pass Low pass HintA bandpass filtering component is used in tuned amplifier.20). In which of the following type of tuning each amplifier stage is slightly tuned to different frequency? Staggered tuning Synchronous tuning Double tuned amplifier Both a and b HintStaggered tuning tunes each amplifier stage is slightly tuned to different frequency.21). A staggered tuned amplifier is applied to ____ type of tuned amplifier? Single Dual Multi Both a and b HintA staggered tuned amplifier is applied to single type of tuned amplifier.22). What is the formula of fractional bandwidth of a staggered tuned amplifier? B=[SQRT(m-1)]/Q B=[SQRT(m-1)] B=[SQRT(m-1)]+Q B=[SQRT(m-1)]/Q2 HintThe formula of fractional bandwidth of a staggered tuned amplifier B=[SQRT(m-1)]/Q.23). What is the value of gain of a 2 staged staggered amplifier? 3dB 2dB 1dB 9dB HintThe value of gain of a 2 staged staggered amplifier is 3dB.24). Which of the following are the application of staggered tuned amplifier? SAW filters IF amplifier Wireless LAN All the above HintThe application of staggered tuned amplifier are SAW filters, IF amplifier and wireless LAN. Read more about Wireless LAN.25). In which of the following tuning amplifier do every staged amplifier is tuned to identical frequency? Staggered tuning Synchronous tuning Double tuned amplifier All the above HintA synchronous tuning amplifier do every staged amplifier is tuned to identical frequency.Transistor Tuned Amplifiers Important Questions for Interviews26). Which of the following type of class amplifier a tuned amplifier is operated? Class A Class B Class C Both a and b HintClass C amplifier is a type of tuned amplifier is operated.27). Which of the following is the frequency of radio frequency? 12kHz 200kHz 100kHz 50kHz HintThe frequency of radio frequency is 200kHz.28). Which of the following is the power factor of a parallel or serial resonance? 0 1 2 3 Hint28. Which of the following is the power factor of a parallel or serial resonance?29). What is the value of resonance frequency of a voltage gain tuned type amplifier? Maximum Minimum Zero Constant HintThe value of resonance frequency is maximum of a voltage gain tuned type amplifier.30). What is the value of impedance in a serial connection? Maximum Minimum Zero Constant HintThe value of impedance in a serial connection is minimum.31). In a parallel or serial connection resonance the behavior of circuit is ____? Resistive Capacitive Inductive Both b and c HintIn a parallel or serial connection resonance, the behavior of the circuit is resistive.32). What is the value of inductance voltage compared to capacitance voltage in series resonance? Equal Greater Lesser Zero HintThe value of inductance voltage compared to capacitance voltage is equal in series resonance.33). What is the value of phase of inductance compared to capacitance in series resonance? In Out Zero Equal HintThe value of phase of inductance compared to capacitance in series resonance is out of phase.34). What happens to resonant frequency in an LC filter when L is increased? Decreases Increases Zero Constant HintThe value of resonant frequency decreases in an LC filter when L is increased.35). What happens to resonant frequency in an LC filter when C is increased? Decreases Increases Zero Constant HintThe value of resonant frequency decreases in an LC filter when C is increased.36). When BW of LC circuit is increased then the value of Q is ______ Increased Decreased Zero Constant HintWhen BW of LC circuit is increased then the value of Q is decreased.37). What is the value of circuit current, in a net reactive based component? 0 1 Inductive Capacitive HintThe value of circuit current, in a net reactive based component, is 0.38). What is the dimension of an L/CR? Ohms Henry Farads Colum’s HintThe dimension of an L/CR is ohms.39). What is the value of Q when L/C ration of parallel LC circuit is increased? Increased Decreased Zero Constant HintThe value of Q is also increased when L/C ration of parallel LC circuit is increased.40). What is phase angle of series resonance? 0 90 45 180 HintThe phase angle of series resonance is 0 degrees.41). Which of the following are the properties of double tuned amplifier? Primary and secondary type windings inductance is tuned separately Uses capacitor Wider bandwidth All the above HintThe properties of double tuned amplifier are primary and secondary type windings inductance is tuned separately with capacitors and has wider bandwidth.42). A tuned amplifier is an ____ type of amplifier? Electrical Electronic Mechanical Both a and b HintA tuned amplifier is an electronic type of amplifier.43). A tuned amplifier is used in _____ type of applications? Wired Wireless Bluetooth Both a and b HintA tuned amplifier is used in wireless type of applications.44). An electronic amplifier ___ the signals power? Increases Decreases Attenuates Both a and b HintAn electronic amplifier increases the signals power.45). The strength of amplifiers signals is varied based on ___ factors? Voltage Current Time Both a and b HintThe strength of amplifiers signals is varied based on current and voltage factors.46). An electronic amplifier has ___ number of ports? 1 2 3 4 HintAn electronic amplifier has ports.47). Which of the following form of energy is given as input to amplifier? Electrical Mechanical Hydraulic Air HintAn electrical power is given as input to amplifier.48). Which of the following signal parameter is amplified using tuned amplifier? Frequency Amplitude Phase All the above HintAmplitude of signal parameter is amplified using tuned amplifier.49). Which of the following is the value of amplifiers power gain? Less than 1 Greater than 1 Equal to 1 0 HintThe value of amplifiers power gain is greater than 1.50). Which of the following is the formula for amplifiers gain? Output / Input Input / Output Input + Output Input – Output HintThe formula for amplifiers gain is output / input. Read more about amplifier.Transistor Tuned Amplifiers Questions & Answers for Exams51). Which of the following are the classification of amplifier? Frequency Physical placement Substance Both a and b HintAmplifiers are classified into different types such as based on frequency like RF amplifier and based on physical placement in the primary stage and secondary stage.52). At which frequency do audio amplifier amplify signal? 20Hz 20KHz 10Hz 10KHz HintAt 20KHz audio amplifier amplifies audio signal.53). A which frequency do RF amplifier amplify signals? 20kHz to 300 GHz 20kHz to 100 GHz 20kHz to 150 GHz 200Hz to 200KHz HintAt 20kHz to 300GHz frequency, an RF amplifier amplifies signals.54). At which frequency do servo type amplifiers work? High Low Constant Zero HintAt lower frequencies servo-type amplifiers work.55). At which frequency do instrumentation type amplifiers work? High Low Constant Zero HintAt lower frequencies instrumentation type amplifiers work.56). Which of the following was the first device to amplify signal? Triode type vacuum based tube Varistor Rheostat All the above HintA triode type vacuum based tube was the first device to amplify signals.57). Who invented first triode type vacuum based tube? Lee De Forest Richard Charles All the above HintLee De Forest invented first triode type vacuum based tube.58). In which year Lee De Forest invented first triode type vacuum based tube? 1906 1907 1908 1909 HintIn 1906 year Lee De Forest invented first triode type vacuum based tube.59). Which of the following component do an amplifier use? Diodes Triode Transistors All the above HintAn amplifier use transistors as main component. Read more about transistor.60). Which of the following is the input for a trans-resistance type amplifier? Current Voltage Resistance Both a and b HintCurrent is the input for a trans-resistance type amplifier.61). Which of the following is the output for a trans-resistance type amplifier? Current Voltage Resistance Both a and b HintCurrent is the output for a trans-resistance type amplifier.62). Which of the following is the unit for current amplifier? Ohms Unit-less Siemens Farads HintThe unit for current amplifier is unit-less.63). Which of the following is the unit for Trans-resistance amplifier? Ohms Siemens Unit-less Farads HintThe unit for Trans-resistance amplifier is Ohms.64). Which of the following is the input form of trans-conductance amplifier? Current Voltage Load Both a and b HintA voltage is the input form of trans-conductance amplifier.65). Which of the following is the output form of trans-conductance amplifier? Current Voltage Load Both a and b HintA current is the output form of trans-conductance amplifier.66). Which of the following is the unit for Trans-conductance amplifier? Ohms Siemens Unit-less Farads HintThe unit for Trans-conductance amplifier is Siemens.67). Which of the following is the input for voltage amplifier? Voltage Current Load All the above HintVoltage is the input for voltage amplifier.68). Which of the following is the output for voltage amplifier? Voltage Current Load All the above HintVoltage is the output for voltage amplifier.69). Which of the following is the input impedance of current type amplifier? 0 1 Infinity 0.5 HintThe input impedance of current type amplifier is 0.70). Which of the following is the output impedance of current type amplifier? 0 Infinity 1 0.5 HintThe output impedance of current type amplifier is infinity.71). Which of the following is the input impedance of trans-resistance type amplifier? 0 0.5 1 Infinity HintThe input impedance of trans-resistance type amplifier is 0.72). Which of the following is the output impedance of trans-resistance type amplifier? 0 0.5 1 Infinity HintThe output impedance of trans-resistance type amplifier is 0.73). Which of the following is the input impedance of trans-conductance type amplifier? 0 0.5 1 Infinity HintThe input impedance of trans-conductance type amplifier is infinity.74). Which of the following is the output impedance of trans- conductance type amplifier? 0 0.5 1 Inifnity HintThe output impedance of trans- conductance type amplifier is infinity.75). Which of the following is the input impedance of voltage type amplifier? 0 0.5 1 Infinity HintThe input impedance of voltage type amplifier is infinity.Transistor Tuned Amplifiers Questions & Answers for Exams76). Which of the following is the output impedance of voltage type amplifier? 0 0.5 1 Infinity HintThe output impedance of voltage type amplifier is 0.77). Which of the following is the advantage provided by amplifiers negative feedback? Enhance bandwidth Enhanced gain control Minimum distortion All the above HintThe advantage provided by amplifiers negative feedback is enhanced bandwidth, enhanced gain control and minimum distortion.78). A zero feedback circuit obtains ____ percent of distortion in audio frequency? 1% 2% 3% 90% HintZero feedback circuit obtains 1% percent of distortion in audio frequency.79). What is the percentage of distortion in audio frequency in a negative feedback circuit? 0.001% 0.2% 0.002% 0.01% HintThe percentage of distortion in audio frequency in a negative feedback circuit is 0.001%.80). Which of the following are the active devices used in an amplifier? Vacuum tubes Transistors Op-amps All the above HintThe active devices used in an amplifier is vacuum tubes, transistors and Op-amps. Read more about Op-amps.81). A vacuum tube amplifiers also called _____? Valve amplifiers Tube amplifiers Vacuum tube All the above HintA vacuum tube amplifiers also called valve amplifiers, tube amplifiers and vacuum amplifier.82). Which of the following are microwave type amplifiers? Klystron Gyrotron Travelling wave amplifier All the above HintExamples of microwave type amplifiers include klystron, gyrotron and travelling wave amplifier. Read more about Klystron Amplifier.83). Which of the following type of amplifier one of the winding controls magnetic cores saturation? Magnetic type amplifier Gyrotron Klystron All the above HintA magnetic type amplifier is a type of amplifier one of the winding controls magnetic cores saturation.84). Which of the following amplifier uses negative resistance? Tunnel diode amplifier Klystron Gyrotron All the above HintA tunnel diode type amplifier uses negative resistance.85). Which of the following type of amplifier does not contains feedback circuit? Bilateral Unilateral Inverting Non inverting HintA unilateral type amplifier does not contains feedback circuit.86). The value of impedance at input of unilateral type amplifier is____ on load ? Dependent Independent Zero None of the above HintThe value of impedance at input of unilateral type amplifier isindependent on load.87). The value of impedance at output of unilateral type amplifier is____ on source impedance signal? Dependent Independent Zero None of the above HintThe value of impedance at output of unilateral type amplifier is independent on source impedance signal.88). Which of the following type of amplifier does contains feedback circuit? Bilateral Inverting Non inverting All the above HintBi-lateral, inverting and non-inverting type amplifier does contains feedback circuit.89). The value of impedance at output of bilateral type amplifier is____ on source impedance signal? Dependent Independent Zero None of the above HintThe value of impedance at output of bilateral type amplifier is dependent on source impedance signal.90). The value of impedance at input of bilateral type amplifier is____ on load? Dependent Independent Zero None of the above HintThe value of impedance at input of bilateral type amplifier is dependent on load.91). An active amplifier such as op-amp is a ____ type of amplifier? DC-coupled based with high gain voltage type AC-coupled based with high gain voltage type AC-coupled based with high gain current type DC-coupled based with high gain currents type HintAn active amplifier such as op-amp is a DC-coupled based with high gain voltage type of amplifier.92). An op-amp has __ number of ended outputs? 1 2 3 4 HintAn op-amp has one ended outputs.93). Op-amps are classified as __ types? 2 3 4 5 HintOp-amps are classified as 2 types namely integrated and discrete. Read more about inverting and non inverting type amplifier.94). Which of the following defines non-inverting type pin configuration of op-amp? V+ V- Vout VS+ HintV+ defines non-inverting type pin configuration of op-amp.95). Which of the following defines inverting type pin configuration of op-amp? V+ V- Vout VS+ HintV- defines non-inverting type pin configuration of op-amp.96). Which of the following defines voltage out type pin configuration of op-amp? V+ V- Vout VS+ HintVout defines voltage out type pin configuration of op-amp.97). Which of the following defines positive type power supply pin configuration of op-amp? V+ V- Vout VS+ HintVS+ defines positive type power supply pin configuration of op-amp.98). Which of the following defines negative type power supply pin configuration of op- amp? V+ VS- Vout VS+ HintVS- defines negative type power supply pin configuration of op-amp.99). An op-amp has ___ input terminals? 2 3 4 5 HintAn op-amp has 2 input terminals V+ and V-.100). Which of the following are the applications of op-amp? Open-loop gain = infinity Input based offset voltage = 0 Noise = zero All the above HintThe applications of op-amp are Open-loop gain = infinity, Input based offset voltage = 0 and Noise = zero. Time is Up! Time's up
