Electronic Devices and Circuits Question & Answers January 17, 2022 By WatElectronics This article lists 100 Electronic Devices and Circuits MCQs for engineering students. All the Electronic Device and Circuit Questions and Answers are given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on Electronic Devices and Circuits. Electronic devices deal with electronic components deployed for controlling the direction of electronic related parameters like voltage, current within the designed circuits. Electronics is a branch that involves subjects such as physics and electrical. These devices are constructed using a combination of active and passive type electronic components such as resistors, capacitors, inductors, transistors, ammeters, and more. An active type of electronic device is a component that requires an external power source for its interfaced load operation, these devices include transistors, diode, LED, etc. Whereas a passive type of electronic device is components that do not need any external power source to operate such as cables, optical fibers, etc. There are various branches of electronics such as IC, digital electronics, nanoelectronics, etc. Where each of these branches deals with different subjective. There is a number of electronic devices developed depending on the application-specific such as amplifiers, oscillators, rectifiers, AC to DC converter, DC to AC converter, etc. They benefit in terms of noise margin, rectify the SNR ratio, are more reliable, etc. But lack in terms of power consumption and require high power. They are used in multiple zones such as domestic as lights, fans; commercial as robots to perform a repeated task, electronic gadgets for rectifying, etc. 1). The field of electronics is a branch of _____ engineering? Physics Electrical Electronic Both a and b None Hint 2). Electronic circuit exhibits ____ properties of electronic devices? Emission Behavior Electrons effect All the above None Hint 3). How many types of devices electronic circuits are classified into? 2 3 4 5 None Hint 4). Which of the following is the properties of active type electronic device? Controls flow of electrons Amplification Rectification All the above None Hint 5). Electrons are ______ polarity? Positive Negative Neutral Both a and b None Hint 6). A device that enhances the signal power is ____? Amplifier Rectifier Clamper All the above None Hint Read more about Diffrential Amplifier 7). An amplifier is also called _____? Electronic amplifier Amp Op-amp Both a and b None Hint 8). An amplifier has _____ number of ports? 2 3 4 5 None Hint 9). To which of the following ports of amplifier supply is provided? Input Output In-out All the above None Hint 10). At which of the following port resultant signal is obtained from amplifier? Input Output In-out All the above None Hint 11). Which of the following term defines the amplified signal output obtained from amplifier? Gain Bandwidth Offset Both a and c None Hint 12). Which of the following is the formula for voltage gain? Output voltage / Input voltage Output voltage + Input voltage Output voltage - Input voltage Output voltage * Input voltage None Hint 13). The value of power gain in an amplifier is _____? equal to 1 less than 1 Greater than 1 0 None Hint 14). A device that transduces AC to DC is called ____? Amplifier Rectifier Oscillator All the above None Hint Read more about Rectifier. 15). Which of the following electronic component performs reverse operation of rectifier? Oscillator Diode Inverter Amplifier None Hint 16). Which of the following are the examples of rectifiers? Vacuum tubes Semiconductor diodes SCR All the above None Hint 17). Which of the following is the major application of a rectifier device? DC power supply High voltage DC power transmission system Detectors All the above None Hint 18). Based on which of the following factors of rectifier output voltage fluctuates? Type of AC supply Rectifier circuit arrangement Type of load Both a and b None Hint 19). The resultant wave from rectifier can be smoothened using _____ electronic components? Capacitor choke Chokes and resistors Voltage regulators All the above None Hint 20). Which of the following types of phases a rectifier circuit can be designed? Single Dual Multi All the above None Hint 21). A domestic application rectifier are of _____ phase? 1 2 3 Multi None Hint 22). The industrial application rectifier are of _____ phase? Single Dual Three Multi None Hint 23). Which of the following is applied to half wave single phase rectifier circuit? Positive half of AC wave Negative half of AC wave Full AC wave Either a or b None Hint 24). How many diodes are required in a single phase half wave rectifier? 1 2 3 4 None Hint 25). How many diodes are required in a 3 phase full wave rectifier? 1 2 3 4 None Hint Electronic Device and Circuit Interview Questions and Answers 26). A rectifier has ___ directional flow of charge? Uni Bi Multi Zero None Hint 27). Which of the following type of rectifier has maximum ripple count? Half Full Half single phase Both a and c None Hint 28). Which of the following type of rectifier requires maximum filters? Single phase Two phase Three phase Multiphase None Hint 29). Which of the following is the Vrms value of ideal half wave rectifier? Vpeak/2 Vpeak/ pi Vpeak *2 Vpeak*pi None Hint 30). Which of the following is the Vdc value of ideal half wave rectifier? Vpeak/2 Vpeak/ pi Vpeak *2 Vpeak*pi None Hint 31). A full wave rectifier rectifies ______ to constant polarity? Input positive wave Input negative wave Input positive and negative wave All the above None Hint 32). Which of the following is the output obtained from full wave rectifier? Pulsating DC Pulsating AC Constant DC All the above None Hint 33). Which of the following are the components of a full wave rectifier? Center tapped transformer Diodes AC source All the above None Hint 34). Which of the following are the passive effects observed in electronic devices? Resistance Capacitance Inductance All the above None Hint 35). A vacuum tube has the capacity to _____? Rectify Amplify Modify Both a and b None Hint 36). Which of the following was the first transistor invented? Diode MOSFET Triode All the above None Hint 37). Which of the following are the major application of electronic devices? Computers Telecommunication Signal processing All the above None Hint Read more about Computers. 38). Electronic branches are of ____ types? 8 9 10 13 None Hint 39). A study that deals with digital signals is called _____ type of electronics? Analogue Digital Power Opto None Hint 40). A study that deals with continuous type variable signal is called _____ type of electronics? Analogue Digital Power Opto None Hint 41). A study that deals with sub fields based electronics is called _____ type of electronics? Analogue Digital Micro Opto None Hint 42). A study and the application of various electronic based systems and applications is called? Analogue Digital Micro Opto None Hint 43). A study of electronics application in order to control and convert the electric power is _____ type of electronics? Analogue Digital Micro Power None Hint 44). Which of the following are the semiconducting devices used in semiconducting appliances? Germanium Gallium Arsenide All the above None Hint 45). A semiconducting device are constructed as ___? Discrete IC Continuous Both a and b None Hint 46). A semiconducting substance are of ______ types? 2 3 5 6 None Hint 47). Which of the following is the positive charge semiconducting type? P-type N-type PN type All the above None Hint 48). Which of the following is the negative charge semiconducting type? P-type N-type PN type All the above None Hint Read more about Semiconductor. 49). A p-type semiconductor has ____ as majority charge carriers? Holes Electrons Protons Neutrons None Hint 50). A n-type semiconductor has ____ as majority charge carriers? Holes Electrons Protons Neutrons None Hint Electronic Device and Circuit Important Questions for Interviews 51). Abbreviate MOSFET? Metal Oxide Semiconductor FET Metal Oxygen Semiconductor FET Metal Oxide Semifurnished FET None of the above None Hint 52). A MOSFET has ___number of terminals? 2 3 4 5 None Hint 53). Which of the following components of MOSFET are isolated from one another? Source and base Source and gate Source and gate Gate and drain None Hint Read more about MOSFET. 54). Which of the following substance separates body and gate terminal in MOSFET? Conducting layer Insulating layer Semiconducting layer All the above None Hint 55). MOSFET works on _____ principle? Conductor Semiconductor Insulator All the above None Hint 56). Which of the following is the advantage of MOSFET? Does not require any input current Requires minimum input current Has high resistance All the above None Hint 57). Which of the following are the advantages of MOSFET? Higher switching capacity Enhance scalability High miniaturization All the above None Hint 58). In which of the following areas MOSFET is implemented? LSI Digital circuits Linear analogue circuits All the above None Hint 59). MOSFET are classified in to _____ types? 2 3 4 5 None Hint 60). A CMOS logic uses ____ MOSFET? P-channel N-channel PNP-channel Both a and b None Hint 61). Which of the following type of insulator substance is used in MOSFET? Silicon dioxide Graphite Diamond All the above None Hint 62). FGMOS stands for _______? Floating Gate MOSFET Floating Gate MOSFET Font Gate MOSFET None of the above None Hint 63). Which of the following are the advantages of digital circuits? Zero degradation of signal while transmitting signal Precise representation Changes can me updated easily All the above None Hint 64). A digital gates performs _____ operation? Mathematical Logical Boolean Both b and c None Hint 65). Which of the following are the basic components of IC? Transistors Diodes Capacitors All the above None Hint 66). Which of the following are the techniques used in digital electronics? Boolean algebra K-map QM algorithm All the above None Hint 67). Digital operations are performed on _____? Computer aided design system Analog circuits integration Digital circuits All the above None Hint 68). A synchronous sequential state in digital circuit is represented using _______? Combinational logic Flip flops Diodes Both a and b None Hint Read more about Flip-Flops. 69). Which of the following are the examples of asynchronous based digital circuits? Arbiters Debouncers Flip-flops All the above None Hint 70). Which of the following are the design issues in digital electronics? Glitches Quick pulse Runt pulse All the above None Hint 71). Which of the following are the components of micro electronics? Transistors Capacitors Diodes All the above None Hint 72). An electronic circuit system is fabricated in _____ steps? 1 2 3 Multi None Hint 73). Which of the following electronic circuit system design stage helps in verifying the accuracy of design? Design specification Synthesizing Schematic representation Simulation None Hint 74). Which of the following is the first step in electronic circuit system design? Design specification Synthesizing Schematic representation Simulation None Hint 75). Which of the following is the second step in electronic circuit system design? Design specification Synthesizing Schematic representation Simulation None Hint Electronic Device and Circuit Quiz Questions and Answers. 76). Which of the following is the third step in electronic circuit system design? Design specification Synthesizing Schematic representation Simulation None Hint 77). Which of the following is the fourth step in electronic circuit system design? Design specification Synthesizing Schematic representation Simulation None Hint 78). Which of the following is the first high power based electronic device developed? Mercury Arc valves Transistors Transformers All the above None Hint 79). Which of the following are modern system for power conversions? Thyristors Power transistors IGBT All the above None Hint Read more about IGBT. 80). A power conversion systems are classified in to _____ types? 2 3 4 5 None Hint 81). An AC to AC is a _____ device? Rectifier Inverter Amplifier All the above None Hint 82). An DC to DC is a _____ device? Rectifier Inverter Amplifier All the above None Hint 83). Which of the following are the components of embedded systems? Memory CPU I/O devices All the above None Hint 84). Which of the following are the memory components of embedded systems? RAM ROM Keyboard Both a and b None Hint 85). Which of the following are the I/O devices of an embedded system? Keyboard Speakers BUS All the above None Hint 86). Which of the following is the modern type embedded system? Microcontroller Microprocessor DSP All the above None Hint 87). DSP stands for ___________? Digital Signal Processor Digital Sign Processor Deviated Signal Processor All the above None Hint 88). A DSP is a ___ type of embedded system? Micro processor Micro Controller Controller All the above None Hint 89). Which of the following are the major application of DSP processor? Sonar Digital image processing Telecommunication All the above None Hint 90). Which of the following is the goal of DSP? Measure Filter Compress All the above None Hint 91). In DSP processor matrix operations performs______? Dot product Convolution for filtering Polynomial evaluation All the above None Hint 92). Fundamental DSP algorithm depends on_____? FIR filters FFT DFT Both a and b None Hint 93). Which of the following are the instructions used in DSP? SIMD VLIW CND Both a and b None Hint 94). SIMD stands for _________? Single Instruction and Multiple Data Single Instruction and Multiple Data Single Instruction and Multiple Digit Single Instruction and Multiple Device None Hint 95). VLIW stands for _______? Very Long Instruction Word Very Least Instruction Word Very Long Instruction Width Very Long Inturn Word None Hint 96). VLIP is designed to exploit _____? ILP Memory Operation All the above None Hint 97). A 8051 microcontroller has ___ number of pins? 20 30 40 50 None Hint 98). Which of the following pin in 8051 microcontroller is an interrupt pin? Pin 10 Pin 11 Pin 12 Pin 20 None Hint 99). Which of the following is the ground pin in 8051 microcontroller is an interrupt pin? Pin 10 Pin 11 Pin 12 Pin 20 None Hint 100). Which following is the Vcc pin in 8051 microcontroller is an interrupt pin? Pin 10 Pin 11 Pin 40 Pin 20 None Hint Time's up
