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 Hint 2). Electronic circuit exhibits ____ properties of electronic devices? Emission Behavior Electrons effect All the above Hint 3). How many types of devices electronic circuits are classified into? 2 3 4 5 Hint 4). Which of the following is the properties of active type electronic device? Controls flow of electrons Amplification Rectification All the above Hint 5). Electrons are ______ polarity? Positive Negative Neutral Both a and b Hint 6). A device that enhances the signal power is ____? Amplifier Rectifier Clamper All the above Hint Read more about Diffrential Amplifier 7). An amplifier is also called _____? Electronic amplifier Amp Op-amp Both a and b Hint 8). An amplifier has _____ number of ports? 2 3 4 5 Hint 9). To which of the following ports of amplifier supply is provided? Input Output In-out All the above Hint 10). At which of the following port resultant signal is obtained from amplifier? Input Output In-out All the above Hint 11). Which of the following term defines the amplified signal output obtained from amplifier? Gain Bandwidth Offset Both a and c 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 Hint 13). The value of power gain in an amplifier is _____? equal to 1 less than 1 Greater than 1 0 Hint 14). A device that transduces AC to DC is called ____? Amplifier Rectifier Oscillator All the above Hint Read more about Rectifier. 15). Which of the following electronic component performs reverse operation of rectifier? Oscillator Diode Inverter Amplifier Hint 16). Which of the following are the examples of rectifiers? Vacuum tubes Semiconductor diodes SCR All the above 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 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 Hint 19). The resultant wave from rectifier can be smoothened using _____ electronic components? Capacitor choke Chokes and resistors Voltage regulators All the above Hint 20). Which of the following types of phases a rectifier circuit can be designed? Single Dual Multi All the above Hint 21). A domestic application rectifier are of _____ phase? 1 2 3 Multi Hint 22). The industrial application rectifier are of _____ phase? Single Dual Three Multi 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 Hint 24). How many diodes are required in a single phase half wave rectifier? 1 2 3 4 Hint 25). How many diodes are required in a 3 phase full wave rectifier? 1 2 3 4 Hint Electronic Device and Circuit Interview Questions and Answers 26). A rectifier has ___ directional flow of charge? Uni Bi Multi Zero Hint 27). Which of the following type of rectifier has maximum ripple count? Half Full Half single phase Both a and c Hint 28). Which of the following type of rectifier requires maximum filters? Single phase Two phase Three phase Multiphase Hint 29). Which of the following is the Vrms value of ideal half wave rectifier? Vpeak/2 Vpeak/ pi Vpeak *2 Vpeak*pi Hint 30). Which of the following is the Vdc value of ideal half wave rectifier? Vpeak/2 Vpeak/ pi Vpeak *2 Vpeak*pi Hint 31). A full wave rectifier rectifies ______ to constant polarity? Input positive wave Input negative wave Input positive and negative wave All the above Hint 32). Which of the following is the output obtained from full wave rectifier? Pulsating DC Pulsating AC Constant DC All the above Hint 33). Which of the following are the components of a full wave rectifier? Center tapped transformer Diodes AC source All the above Hint 34). Which of the following are the passive effects observed in electronic devices? Resistance Capacitance Inductance All the above Hint 35). A vacuum tube has the capacity to _____? Rectify Amplify Modify Both a and b Hint 36). Which of the following was the first transistor invented? Diode MOSFET Triode All the above Hint 37). Which of the following are the major application of electronic devices? Computers Telecommunication Signal processing All the above Hint Read more about Computers. 38). Electronic branches are of ____ types? 8 9 10 13 Hint 39). A study that deals with digital signals is called _____ type of electronics? Analogue Digital Power Opto Hint 40). A study that deals with continuous type variable signal is called _____ type of electronics? Analogue Digital Power Opto Hint 41). A study that deals with sub fields based electronics is called _____ type of electronics? Analogue Digital Micro Opto Hint 42). A study and the application of various electronic based systems and applications is called? Analogue Digital Micro Opto Hint 43). A study of electronics application in order to control and convert the electric power is _____ type of electronics? Analogue Digital Micro Power Hint 44). Which of the following are the semiconducting devices used in semiconducting appliances? Germanium Gallium Arsenide All the above Hint 45). A semiconducting device are constructed as ___? Discrete IC Continuous Both a and b Hint 46). A semiconducting substance are of ______ types? 2 3 5 6 Hint 47). Which of the following is the positive charge semiconducting type? P-type N-type PN type All the above Hint 48). Which of the following is the negative charge semiconducting type? P-type N-type PN type All the above Hint Read more about Semiconductor. 49). A p-type semiconductor has ____ as majority charge carriers? Holes Electrons Protons Neutrons Hint 50). A n-type semiconductor has ____ as majority charge carriers? Holes Electrons Protons Neutrons 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 Hint 52). A MOSFET has ___number of terminals? 2 3 4 5 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 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 Hint 55). MOSFET works on _____ principle? Conductor Semiconductor Insulator All the above 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 Hint 57). Which of the following are the advantages of MOSFET? Higher switching capacity Enhance scalability High miniaturization All the above Hint 58). In which of the following areas MOSFET is implemented? LSI Digital circuits Linear analogue circuits All the above Hint 59). MOSFET are classified in to _____ types? 2 3 4 5 Hint 60). A CMOS logic uses ____ MOSFET? P-channel N-channel PNP-channel Both a and b Hint 61). Which of the following type of insulator substance is used in MOSFET? Silicon dioxide Graphite Diamond All the above Hint 62). FGMOS stands for _______? Floating Gate MOSFET Floating Gate MOSFET Font Gate MOSFET None of the above 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 Hint 64). A digital gates performs _____ operation? Mathematical Logical Boolean Both b and c Hint 65). Which of the following are the basic components of IC? Transistors Diodes Capacitors All the above Hint 66). Which of the following are the techniques used in digital electronics? Boolean algebra K-map QM algorithm All the above Hint 67). Digital operations are performed on _____? Computer aided design system Analog circuits integration Digital circuits All the above Hint 68). A synchronous sequential state in digital circuit is represented using _______? Combinational logic Flip flops Diodes Both a and b 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 Hint 70). Which of the following are the design issues in digital electronics? Glitches Quick pulse Runt pulse All the above Hint 71). Which of the following are the components of micro electronics? Transistors Capacitors Diodes All the above Hint 72). An electronic circuit system is fabricated in _____ steps? 1 2 3 Multi Hint 73). Which of the following electronic circuit system design stage helps in verifying the accuracy of design? Design specification Synthesizing Schematic representation Simulation Hint 74). Which of the following is the first step in electronic circuit system design? Design specification Synthesizing Schematic representation Simulation Hint 75). Which of the following is the second step in electronic circuit system design? Design specification Synthesizing Schematic representation Simulation 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 Hint 77). Which of the following is the fourth step in electronic circuit system design? Design specification Synthesizing Schematic representation Simulation Hint 78). Which of the following is the first high power based electronic device developed? Mercury Arc valves Transistors Transformers All the above Hint 79). Which of the following are modern system for power conversions? Thyristors Power transistors IGBT All the above Hint Read more about IGBT. 80). A power conversion systems are classified in to _____ types? 2 3 4 5 Hint 81). An AC to AC is a _____ device? Rectifier Inverter Amplifier All the above Hint 82). An DC to DC is a _____ device? Rectifier Inverter Amplifier All the above Hint 83). Which of the following are the components of embedded systems? Memory CPU I/O devices All the above Hint 84). Which of the following are the memory components of embedded systems? RAM ROM Keyboard Both a and b Hint 85). Which of the following are the I/O devices of an embedded system? Keyboard Speakers BUS All the above Hint 86). Which of the following is the modern type embedded system? Microcontroller Microprocessor DSP All the above Hint 87). DSP stands for ___________? Digital Signal Processor Digital Sign Processor Deviated Signal Processor All the above Hint 88). A DSP is a ___ type of embedded system? Micro processor Micro Controller Controller All the above Hint 89). Which of the following are the major application of DSP processor? Sonar Digital image processing Telecommunication All the above Hint 90). Which of the following is the goal of DSP? Measure Filter Compress All the above Hint 91). In DSP processor matrix operations performs______? Dot product Convolution for filtering Polynomial evaluation All the above Hint 92). Fundamental DSP algorithm depends on_____? FIR filters FFT DFT Both a and b Hint 93). Which of the following are the instructions used in DSP? SIMD VLIW CND Both a and b 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 Hint 95). VLIW stands for _______? Very Long Instruction Word Very Least Instruction Word Very Long Instruction Width Very Long Inturn Word Hint 96). VLIP is designed to exploit _____? ILP Memory Operation All the above Hint 97). A 8051 microcontroller has ___ number of pins? 20 30 40 50 Hint 98). Which of the following pin in 8051 microcontroller is an interrupt pin? Pin 10 Pin 11 Pin 12 Pin 20 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 Hint 100). Which following is the Vcc pin in 8051 microcontroller is an interrupt pin? Pin 10 Pin 11 Pin 40 Pin 20 Hint Time's up
