Electronic Devices and Circuits Question & AnswersJanuary 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 Hint2 subjects.2). Electronic circuit exhibits ____ properties of electronic devices? Emission Behavior Electrons effect All the above Hint3 properties.3). How many types of devices electronic circuits are classified into? 2 3 4 5 HintMinimum number.4). Which of the following is the properties of active type electronic device? Controls flow of electrons Amplification Rectification All the above Hint3 properties.5). Electrons are ______ polarity? Positive Negative Neutral Both a and b HintInverting terminal means?6). A device that enhances the signal power is ____? Amplifier Rectifier Clamper All the above HintUsed in music equipment. Read more about Diffrential Amplifier7). An amplifier is also called _____? Electronic amplifier Amp Op-amp Both a and b Hint2 names.8). An amplifier has _____ number of ports? 2 3 4 5 Hintminimum number.9). To which of the following ports of amplifier supply is provided? Input Output In-out All the above HintAt source end of amplifier.10). At which of the following port resultant signal is obtained from amplifier? Input Output In-out All the above HintLoaded terminal.11). Which of the following term defines the amplified signal output obtained from amplifier? Gain Bandwidth Offset Both a and c HintMeasured in logarithmic decibel (dB) units .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 HintDivision term.13). The value of power gain in an amplifier is _____? equal to 1 less than 1 Greater than 1 0 HintHigher value.14). A device that transduces AC to DC is called ____? Amplifier Rectifier Oscillator All the above Hint"straightens" the direction of current. Read more about Rectifier.15). Which of the following electronic component performs reverse operation of rectifier? Oscillator Diode Inverter Amplifier HintA device that converts direct current (DC) to alternating current (AC).16). Which of the following are the examples of rectifiers? Vacuum tubes Semiconductor diodes SCR All the above Hint3 types.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 Hint3 rules.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 HintSource and design.19). The resultant wave from rectifier can be smoothened using _____ electronic components? Capacitor choke Chokes and resistors Voltage regulators All the above Hint3 devices.20). Which of the following types of phases a rectifier circuit can be designed? Single Dual Multi All the above HintMany.21). A domestic application rectifier are of _____ phase? 1 2 3 Multi HintUni phase.22). The industrial application rectifier are of _____ phase? Single Dual Three Multi HintMany23). 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 Hint2of the cycles of wave.24). How many diodes are required in a single phase half wave rectifier? 1 2 3 4 HintUni.25). How many diodes are required in a 3 phase full wave rectifier? 1 2 3 4 HintOdd number of diodes.Electronic Device and Circuit Interview Questions and Answers26). A rectifier has ___ directional flow of charge? Uni Bi Multi Zero HintSingle.27). Which of the following type of rectifier has maximum ripple count? Half Full Half single phase Both a and c HintEither only positive or negative.28). Which of the following type of rectifier requires maximum filters? Single phase Two phase Three phase Multiphase HintUni phase.29). Which of the following is the Vrms value of ideal half wave rectifier? Vpeak/2 Vpeak/ pi Vpeak *2 Vpeak*pi HintAverage of terms,30). Which of the following is the Vdc value of ideal half wave rectifier? Vpeak/2 Vpeak/ pi Vpeak *2 Vpeak*pi HintDivision.31). A full wave rectifier rectifies ______ to constant polarity? Input positive wave Input negative wave Input positive and negative wave All the above Hint2 polarities.32). Which of the following is the output obtained from full wave rectifier? Pulsating DC Pulsating AC Constant DC All the above HintDirect current.33). Which of the following are the components of a full wave rectifier? Center tapped transformer Diodes AC source All the above Hint3 components.34). Which of the following are the passive effects observed in electronic devices? Resistance Capacitance Inductance All the above Hint3 effects.35). A vacuum tube has the capacity to _____? Rectify Amplify Modify Both a and b Hint3 capacities.36). Which of the following was the first transistor invented? Diode MOSFET Triode All the above HintAlso called Insulated Gate Field Effect Transistor.37). Which of the following are the major application of electronic devices? Computers Telecommunication Signal processing All the above HintElectronic appliances. Read more about Computers.38). Electronic branches are of ____ types? 8 9 10 13 HintMaximum value.39). A study that deals with digital signals is called _____ type of electronics? Analogue Digital Power Opto HintExpressed in 0's and 1's.40). A study that deals with continuous type variable signal is called _____ type of electronics? Analogue Digital Power Opto HintAny continuous signal for which the time-varying feature of the signal represents some other time-varying quantity.41). A study that deals with sub fields based electronics is called _____ type of electronics? Analogue Digital Micro Opto HintHolds unique wiring techniques such as wire bonding.42). A study and the application of various electronic based systems and applications is called? Analogue Digital Micro Opto HintExample gamma rays, X-rays, ultraviolet and infrared,.43). A study of electronics application in order to control and convert the electric power is _____ type of electronics? Analogue Digital Micro Power HintMeasures in megawatt.44). Which of the following are the semiconducting devices used in semiconducting appliances? Germanium Gallium Arsenide All the above Hint3 substances.45). A semiconducting device are constructed as ___? Discrete IC Continuous Both a and b Hint2 terms.46). A semiconducting substance are of ______ types? 2 3 5 6 HintMinimum number.47). Which of the following is the positive charge semiconducting type? P-type N-type PN type All the above HintHoles as majority carriers.48). Which of the following is the negative charge semiconducting type? P-type N-type PN type All the above HintElectrons as majority carriers. Read more about Semiconductor.49). A p-type semiconductor has ____ as majority charge carriers? Holes Electrons Protons Neutrons HintPositive carriers.50). A n-type semiconductor has ____ as majority charge carriers? Holes Electrons Protons Neutrons HintNegative terms.Electronic Device and Circuit Important Questions for Interviews51). Abbreviate MOSFET? Metal Oxide Semiconductor FET Metal Oxygen Semiconductor FET Metal Oxide Semifurnished FET None of the above HintUsed to switch or amplify voltages in circuits.52). A MOSFET has ___number of terminals? 2 3 4 5 Hint2*2=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 HintMiddle terminals in MOSFET. 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 HintA layer that oppose current.55). MOSFET works on _____ principle? Conductor Semiconductor Insulator All the above HintP-type and N-type.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 HintDepends on input.57). Which of the following are the advantages of MOSFET? Higher switching capacity Enhance scalability High miniaturization All the above Hint3 advantages.58). In which of the following areas MOSFET is implemented? LSI Digital circuits Linear analogue circuits All the above Hint3 areas.59). MOSFET are classified in to _____ types? 2 3 4 5 HintMinimum number.60). A CMOS logic uses ____ MOSFET? P-channel N-channel PNP-channel Both a and b Hint2 Channels.61). Which of the following type of insulator substance is used in MOSFET? Silicon dioxide Graphite Diamond All the above HintContains oxide element.62). FGMOS stands for _______? Floating Gate MOSFET Floating Gate MOSFET Font Gate MOSFET None of the above HintFGMOS stands for Floating Gate MOSFET.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 Hint3 advantages.64). A digital gates performs _____ operation? Mathematical Logical Boolean Both b and c HintInvolves in 0's and 1's operation.65). Which of the following are the basic components of IC? Transistors Diodes Capacitors All the above HintPassive components,66). Which of the following are the techniques used in digital electronics? Boolean algebra K-map QM algorithm All the above Hint3 methods.67). Digital operations are performed on _____? Computer aided design system Analog circuits integration Digital circuits All the above HintProcessor based.68). A synchronous sequential state in digital circuit is represented using _______? Combinational logic Flip flops Diodes Both a and b Hint2 types. 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 Hint3 components.70). Which of the following are the design issues in digital electronics? Glitches Quick pulse Runt pulse All the above Hint3 types.71). Which of the following are the components of micro electronics? Transistors Capacitors Diodes All the above Hint3 components.72). An electronic circuit system is fabricated in _____ steps? 1 2 3 Multi Hintmany.73). Which of the following electronic circuit system design stage helps in verifying the accuracy of design? Design specification Synthesizing Schematic representation Simulation Hintlast step.74). Which of the following is the first step in electronic circuit system design? Design specification Synthesizing Schematic representation Simulation HintBasic step with raw data.75). Which of the following is the second step in electronic circuit system design? Design specification Synthesizing Schematic representation Simulation HintObtain result.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 HintDiagrammatic form.77). Which of the following is the fourth step in electronic circuit system design? Design specification Synthesizing Schematic representation Simulation HintActual result.78). Which of the following is the first high power based electronic device developed? Mercury Arc valves Transistors Transformers All the above HintVolatile substance.79). Which of the following are modern system for power conversions? Thyristors Power transistors IGBT All the above Hint3 types. Read more about IGBT.80). A power conversion systems are classified in to _____ types? 2 3 4 5 HintEven number.81). An AC to AC is a _____ device? Rectifier Inverter Amplifier All the above Hint"straightens" the direction of current.82). An DC to DC is a _____ device? Rectifier Inverter Amplifier All the above HintPerforms opposite to input.83). Which of the following are the components of embedded systems? Memory CPU I/O devices All the above Hint3 components.84). Which of the following are the memory components of embedded systems? RAM ROM Keyboard Both a and b Hint2 components.85). Which of the following are the I/O devices of an embedded system? Keyboard Speakers BUS All the above Hint3 components.86). Which of the following is the modern type embedded system? Microcontroller Microprocessor DSP All the above Hint3 components.87). DSP stands for ___________? Digital Signal Processor Digital Sign Processor Deviated Signal Processor All the above HintDSP stands for Digital Signal Processor.88). A DSP is a ___ type of embedded system? Micro processor Micro Controller Controller All the above HintExample Intel 8085.89). Which of the following are the major application of DSP processor? Sonar Digital image processing Telecommunication All the above Hint3 components.90). Which of the following is the goal of DSP? Measure Filter Compress All the above Hint3 goals.91). In DSP processor matrix operations performs______? Dot product Convolution for filtering Polynomial evaluation All the above Hint3 operations.92). Fundamental DSP algorithm depends on_____? FIR filters FFT DFT Both a and b Hint2 filters.93). Which of the following are the instructions used in DSP? SIMD VLIW CND Both a and b Hint2 types.94). SIMD stands for _________? Single Instruction and Multiple Data Single Instruction and Multiple Data Single Instruction and Multiple Digit Single Instruction and Multiple Device HintSIMD stands for Single Instruction and Multiple Data.95). VLIW stands for _______? Very Long Instruction Word Very Least Instruction Word Very Long Instruction Width Very Long Inturn Word HintVLIW stands for Very Long Instruction Word.96). VLIP is designed to exploit _____? ILP Memory Operation All the above HintDepends on instruction.97). A 8051 microcontroller has ___ number of pins? 20 30 40 50 Hint4*10=98). Which of the following pin in 8051 microcontroller is an interrupt pin? Pin 10 Pin 11 Pin 12 Pin 20 Hint4*3=99). Which of the following is the ground pin in 8051 microcontroller is an interrupt pin? Pin 10 Pin 11 Pin 12 Pin 20 Hint2*10=100). Which following is the Vcc pin in 8051 microcontroller is an interrupt pin? Pin 10 Pin 11 Pin 40 Pin 20 Hint4*10= Time's up
