Transistor Tuned Amplifiers Question & Answers November 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 Hint Read more about stagger tuned amplifier. 2). A single tuned amplifier contains ___ number of tuner sections? 1 2 3 0 Hint 3). Which of the following are the components involved in single tuned amplifier? Resistors Capacitors Inductors All the above Hint Read more about resistor. 4). At which of the following component of single tuned amplifier output is obtained? Resistor Capacitor Coupling capacitor Inductor Hint 5). What is the value of frequency applied to single tuned amplifier? High Low Medium Both a and b Hint 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 Hint 7). What is the purpose of amplifier? Tuning Selecting Clipping Both a and b Hint 8). A tuned amplifier is also called as________? Tuned amplifier LC circuit Tank circuit All the above Hint 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}] Hint 10). A single tuned amplifier, is an example of ___ transistor configuration? CE CC CB All the above Hint 11). Which of the following circuit in single tuned amplifier amplifies signal? RLC LC RC RL Hint 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 Hint 13). What is the value of Rac in a single tuned amplifier? L/CR R/LC R+LC R/L+C Hint 14). What is the value of bandwidth of a single tuned amplifier? BW=f2-f1 BW=f1+f2 BW=f1/f2 BW=f1*f2 Hint 15). What happens to the value of bandwidth when there is increase in voltage gain? Increases Decreases Constant Zero Hint 16). Which of the following are the advantages provided by single tuned amplifier? High selectivity Small supply voltage Less power loss All the above Hint 17). Which of the following are the disadvantages experienced by single tuned amplifier? Bandwidth is small High selectivity High power loss All the above Hint 18). Which of the following are the applications of single tuned amplifier? Television Radio receiver RF amplifier All the above Hint 19). A which of the following filtering component is used in tuned amplifier? Bandpass Side pass High pass Low pass Hint 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 Hint 21). A staggered tuned amplifier is applied to ____ type of tuned amplifier? Single Dual Multi Both a and b Hint 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 Hint 23). What is the value of gain of a 2 staged staggered amplifier? 3dB 2dB 1dB 9dB Hint 24). Which of the following are the application of staggered tuned amplifier? SAW filters IF amplifier Wireless LAN All the above Hint 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 Hint Transistor Tuned Amplifiers Important Questions for Interviews 26). Which of the following type of class amplifier a tuned amplifier is operated? Class A Class B Class C Both a and b Hint 27). Which of the following is the frequency of radio frequency? 12kHz 200kHz 100kHz 50kHz Hint 28). Which of the following is the power factor of a parallel or serial resonance? 0 1 2 3 Hint 29). What is the value of resonance frequency of a voltage gain tuned type amplifier? Maximum Minimum Zero Constant Hint 30). What is the value of impedance in a serial connection? Maximum Minimum Zero Constant Hint 31). In a parallel or serial connection resonance the behavior of circuit is ____? Resistive Capacitive Inductive Both b and c Hint 32). What is the value of inductance voltage compared to capacitance voltage in series resonance? Equal Greater Lesser Zero Hint 33). What is the value of phase of inductance compared to capacitance in series resonance? In Out Zero Equal Hint 34). What happens to resonant frequency in an LC filter when L is increased? Decreases Increases Zero Constant Hint 35). What happens to resonant frequency in an LC filter when C is increased? Decreases Increases Zero Constant Hint 36). When BW of LC circuit is increased then the value of Q is ______ Increased Decreased Zero Constant Hint 37). What is the value of circuit current, in a net reactive based component? 0 1 Inductive Capacitive Hint 38). What is the dimension of an L/CR? Ohms Henry Farads Colum’s Hint 39). What is the value of Q when L/C ration of parallel LC circuit is increased? Increased Decreased Zero Constant Hint 40). What is phase angle of series resonance? 0 90 45 180 Hint 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 Hint 42). A tuned amplifier is an ____ type of amplifier? Electrical Electronic Mechanical Both a and b Hint 43). A tuned amplifier is used in _____ type of applications? Wired Wireless Bluetooth Both a and b Hint 44). An electronic amplifier ___ the signals power? Increases Decreases Attenuates Both a and b Hint 45). The strength of amplifiers signals is varied based on ___ factors? Voltage Current Time Both a and b Hint 46). An electronic amplifier has ___ number of ports? 1 2 3 4 Hint 47). Which of the following form of energy is given as input to amplifier? Electrical Mechanical Hydraulic Air Hint 48). Which of the following signal parameter is amplified using tuned amplifier? Frequency Amplitude Phase All the above Hint 49). Which of the following is the value of amplifiers power gain? Less than 1 Greater than 1 Equal to 1 0 Hint 50). Which of the following is the formula for amplifiers gain? Output / Input Input / Output Input + Output Input – Output Hint Read more about amplifier. Transistor Tuned Amplifiers Questions & Answers for Exams 51). Which of the following are the classification of amplifier? Frequency Physical placement Substance Both a and b Hint 52). At which frequency do audio amplifier amplify signal? 20Hz 20KHz 10Hz 10KHz Hint 53). A which frequency do RF amplifier amplify signals? 20kHz to 300 GHz 20kHz to 100 GHz 20kHz to 150 GHz 200Hz to 200KHz Hint 54). At which frequency do servo type amplifiers work? High Low Constant Zero Hint 55). At which frequency do instrumentation type amplifiers work? High Low Constant Zero Hint 56). Which of the following was the first device to amplify signal? Triode type vacuum based tube Varistor Rheostat All the above Hint 57). Who invented first triode type vacuum based tube? Lee De Forest Richard Charles All the above Hint 58). In which year Lee De Forest invented first triode type vacuum based tube? 1906 1907 1908 1909 Hint 59). Which of the following component do an amplifier use? Diodes Triode Transistors All the above Hint 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 Hint 61). Which of the following is the output for a trans-resistance type amplifier? Current Voltage Resistance Both a and b Hint 62). Which of the following is the unit for current amplifier? Ohms Unit-less Siemens Farads Hint 63). Which of the following is the unit for Trans-resistance amplifier? Ohms Siemens Unit-less Farads Hint 64). Which of the following is the input form of trans-conductance amplifier? Current Voltage Load Both a and b Hint 65). Which of the following is the output form of trans-conductance amplifier? Current Voltage Load Both a and b Hint 66). Which of the following is the unit for Trans-conductance amplifier? Ohms Siemens Unit-less Farads Hint 67). Which of the following is the input for voltage amplifier? Voltage Current Load All the above Hint 68). Which of the following is the output for voltage amplifier? Voltage Current Load All the above Hint 69). Which of the following is the input impedance of current type amplifier? 0 1 Infinity 0.5 Hint 70). Which of the following is the output impedance of current type amplifier? 0 Infinity 1 0.5 Hint 71). Which of the following is the input impedance of trans-resistance type amplifier? 0 0.5 1 Infinity Hint 72). Which of the following is the output impedance of trans-resistance type amplifier? 0 0.5 1 Infinity Hint 73). Which of the following is the input impedance of trans-conductance type amplifier? 0 0.5 1 Infinity Hint 74). Which of the following is the output impedance of trans- conductance type amplifier? 0 0.5 1 Inifnity Hint 75). Which of the following is the input impedance of voltage type amplifier? 0 0.5 1 Infinity Hint Transistor Tuned Amplifiers Questions & Answers for Exams 76). Which of the following is the output impedance of voltage type amplifier? 0 0.5 1 Infinity Hint 77). Which of the following is the advantage provided by amplifiers negative feedback? Enhance bandwidth Enhanced gain control Minimum distortion All the above Hint 78). A zero feedback circuit obtains ____ percent of distortion in audio frequency? 1% 2% 3% 90% Hint 79). What is the percentage of distortion in audio frequency in a negative feedback circuit? 0.001% 0.2% 0.002% 0.01% Hint 80). Which of the following are the active devices used in an amplifier? Vacuum tubes Transistors Op-amps All the above Hint Read more about Op-amps. 81). A vacuum tube amplifiers also called _____? Valve amplifiers Tube amplifiers Vacuum tube All the above Hint 82). Which of the following are microwave type amplifiers? Klystron Gyrotron Travelling wave amplifier All the above Hint 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 Hint 84). Which of the following amplifier uses negative resistance? Tunnel diode amplifier Klystron Gyrotron All the above Hint 85). Which of the following type of amplifier does not contains feedback circuit? Bilateral Unilateral Inverting Non inverting Hint 86). The value of impedance at input of unilateral type amplifier is____ on load ? Dependent Independent Zero None of the above Hint 87). The value of impedance at output of unilateral type amplifier is____ on source impedance signal? Dependent Independent Zero None of the above Hint 88). Which of the following type of amplifier does contains feedback circuit? Bilateral Inverting Non inverting All the above Hint 89). The value of impedance at output of bilateral type amplifier is____ on source impedance signal? Dependent Independent Zero None of the above Hint 90). The value of impedance at input of bilateral type amplifier is____ on load? Dependent Independent Zero None of the above Hint 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 Hint 92). An op-amp has __ number of ended outputs? 1 2 3 4 Hint 93). Op-amps are classified as __ types? 2 3 4 5 Hint 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+ Hint 95). Which of the following defines inverting type pin configuration of op-amp? V+ V- Vout VS+ Hint 96). Which of the following defines voltage out type pin configuration of op-amp? V+ V- Vout VS+ Hint 97). Which of the following defines positive type power supply pin configuration of op-amp? V+ V- Vout VS+ Hint 98). Which of the following defines negative type power supply pin configuration of op- amp? V+ VS- Vout VS+ Hint 99). An op-amp has ___ input terminals? 2 3 4 5 Hint 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 Hint Time is Up! Time's up
