Semiconductor Device Question & AnswersJanuary 24, 2022 By WatElectronics This article lists 100 Semiconductor Device MCQs for engineering students. All the Semiconductor Device Questions and Answers 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 Semiconductor devices.A device that relies on the properties of a semiconductor and functions accordingly is called a semiconductor device. Semiconductor devices such as diodes, rectifiers, amplifiers, etc are designed using semiconductor substances that include gallium, silicon, and germanium. These devices are designed to overcome the drawback attained by vacuum tubes. These devices can be manufactured on 2 platforms is on an integrated chip called IC and as single discrete devices. The conductivity of these devices mainly depends on the level of doping impurities such as p-type or n-type.These semiconductor devices are classified into 2 types namely majority carrier devices and minority carrier devices. Where majority carrier device includes JFET, Schottky diode and powers MOSFET and BJT, PIN diode, IGBT and thyristor are the examples of minority carrier devices. These devices benefit in terms of minim required voltage, compact, budget-friendly, small size, and more life span. But lack in terms of noise level, miss handling of high power and high frequency. Multivibrators, Schottky diode, TRIAC, BJT, and more are a few of the applications of semiconductor devices.1). A semiconductor device is a _____ component? Electronic Electric Mechanic Both a and c HintP-type and N-type devices.2). On which of the following materials properties electronic devices depends on? Silicon Germanium Gallium All the above Hint3 properties.3). ____ is a solid based semiconducting substance? Organic Crystal Liquid All the above HintExamples are doped polyacetylene and doped light-emitting diodes.4). Which of the following device where replaced by semiconductor device? Vacuum tubes Hygrometers Barometers Pipet HintA electronic device used in many older model radios.5). Semiconductor device perform conduction in _____ state? Solid Liquid Gas All the above HintThree-dimensional structure.6). A vacuum tube perform conduction in ____ state? Solid Liquid Thermionic All the above HintAn emission of charged particles (such as electrons) by an incandescent material.7). In how many packages semiconductor devices are manufactured? 2 3 4 5 HintMinimum value.8). Which of the following are the examples of discrete devices? Radio receiver Oscillator Amplifier All the above Hint3 examples. Read more about Radio.9). IC stands for ___? Integrated Circuits Intellect circuit All the above HintElectronic chip.10). An IC is also called ___? Monolithic IC Micro chip Chip All the above Hint3 names.11). An IC comprises of _____ on the chip? Electronic circuits Electric elements Semiconductor material Both a and c Hint2 components.12). ______ devices are integrated in huge quantity on an IC? Switched Transistors MOSFET All the above HintIs a type of insulated-gate field-effect transistor.13). MOSFET stands for _____? Metal oxide FET Metal oxygen FET Main Oxide FET All the above HintFabricated by the controlled oxidation of a semiconductor.14). A MOST FET is a ____ device type? Semiconductor Discrete Continuous All the above HintP-type and N-type.15). Which of the following is the result form obtained from MOSFET? Small in magnitude Faster Less expensive All the above Hint3 parameters.16). ____ properties of IC design lead to rapid adoption of standardized IC? Capability Reliability Building block All the above Hint3 properties.17). Which of the following are the electronic device application of IC? TV Computer Mobile All the above HintDIY appliances. Read more about Computer.18). Which of the following are small IC applications? Modems Microprocessors All the above Hint3 applications.19). A microcontroller has ___ number of CPUs? 1 2 3 Both b and c HintHigher value.20). Program memory in microprocessor comprises of _____? Ferroelectric RAM NOR flash OTP ROM All the above Hint3 components.21). A semiconductor wafer is also called ____? Substrate Gate Source All the above HintA slice of semiconductor material such as silicon , metal oxide or gallium arsenide ( GaAs ).22). Behavior of semiconductor device depends on _____? Doping levels Carrier concentration Polarity Both a and b Hintdepends on 2 parameters. Read more about Intrinsic and Extrinsic Semiconductor Doping.23). The process of doping is done in _____ type of semiconductor device? Intrinsic Extrinsic External Both b and c HintNatural doping process.24). An intrinsic type semiconductors is also called ____? Pure semiconductor i-type semiconductor Un-doped semiconductor All the above Hint3 names.25). The process of doping is done for improving ____ properties? Structural Optical Electrical All the above Hint3 properties.Semiconductor Device Interview Questions and Answers26). Conduction in semiconductor device occurs due to ______? Charge carriers Holes Electrons All the above HintCarriers polarity.27). Which of the following are the semiconductor device? Diode Transistor LED All the above Hint2 terminal devices. Read more about LED.28). A diode is made up of _____junction? P N PN All the above HintPentavalent and trivalent impurities.29). A P-type has majority as ______ carriers? Holes Electrons Positive Both a and c HintNon inverting.30). A N-type has majority as ______ carriers? Holes Electrons Positive Both a and c HintInverting terminal.31). In PN diode forward bias condition the p-type is connected to ______ polarity of battery or source? +ve –Ve Non inverting Both a and c HintMajority holes.32). In PN diode forward bias condition the n-type is connected to ______ polarity of battery or source? +ve –Ve Non inverting Both a and c HintInverting terminal.33). In PN diode forward bias condition the barrier size is ______? Wider Thicker Thinner Both a and b HintBigger in size.34). In PN diode reverse bias condition the barrier size is ______? Wider Thicker Thinner Both a and b HintSmaller.35). The conductivity in semiconductor device can be controlled by ______? Inducing electric field Inducing magnetic field Inducting mechanical pressure All the above Hint3 parameters.36). A diode is constructed with _____ number of pn junctions? 1 2 3 4 HintUni.37). A diode has ____ number of terminals? 1 2 3 4 HintMinimum number.38). A diode is a ____ element? Active Passive Source dependent Both a and b HintSource dependent.39). Which of the following is the units of resistance? Ohms Volts Amperes Farads HintThe units of resistance is ohms.40). A photo diode has ____ number of terminals? 1 2 3 4 HintMinimum number.41). A photo diode is exposed to ______ rays? UV X Light Both a and b Hintwavelength from 10 nm to 400 nm.42). A photo diode converts _____ energy to current? Light Gas Liquid Vapor HintLuminous energy.43). A photo diode operates in _____ bias? Forward Reverse Both a and b Zero HintMinority carriers.44). A photo diode is of ____ structure? PIN PN junction Both a and b S shape Hint2 types.45). Identify the semiconductor device symbol displayed below.Diode Photo diode Zener diode Varactor diode All the above HintContain optical filters.46). Identify the semiconductor device symbol displayed below.Diode Photo diode Zener diode Varactor diode All the above HintAllow current to flow "backwards". Read more about Zener Diode.47). Identify the semiconductor device symbol displayed below.Diode Photo diode Zener diode Varactor diode All the above HintVoltage-dependent capacitance of a reverse-biased p–n junction. Read more about Varactor Diode.48). In photo diode ____ terminal is provided with positive charge? Anode Cathode Non inverting terminal Both a and c HintInverting terminal.49). In photo diode ____ terminal is provided with negative charge? Anode Cathode Non inverting terminal Both a and c HintPositive terminal.50). Which of the following substance are used for developing photo diode? Silicon Germanium Mercury Cadmium tellurium All the above Hint3 components.Semiconductor Device Quiz Questions and Answers.51). A micro controller is a _____device? Remote Computer Storage Sensor HintDevice.52). Which of the following are the memory elements of microcontroller? NOR flash Ferroelectric RAM OTP ROM All the above Hint3 types.53). Which of the following are the advanced peripherals interfaced to microcontrollers? Wi-Fi modules Coprocessors GPU All the above Hint3 components.54). Which of the following are the applications of microcontrollers? Automobile engines Embedded systems Toys All the above Hint3 components.55). A GPU is designed to alter _______ component of processor? Memory Ports Controller Bus HintStorage device.56). Which of the following are the applications of GPU? Mobile phones Game consoles Workstations All the above HintInterface LCD based device.57). DIAC stands for ______? Diode for Alternative Current Diode for App Current Di for Alternative Current Divide for App Current HintDIAC stands for Diode for App Current.58). A DIAC is a _____ type of component? Active Passive Source dependent Both b and c Hint2 types.59). A DIAC has _____ number of pins? 1 2 3 4 HintMinimum number.60). A DIAC has ___ number of layers? 1 2 3 4 HintOdd number.61). Which of the following is the breakover voltage of DIAC? 30V 40V 2V 3V HintMaximum value.62). Which of the following is not a part of DIAC? Source Gate Drain All the above HintCreates a heavily doped PN junction region.63). A DIAC is also called ______ diode? Symmetrical trigger Asymmetrical trigger Systematic trigger Both b and c HintA comparator circuit.64). DIACS are ____ directional devices? Bi Tri Uni Multi Hint2 ways.65). Which of the following are the characteristics of SIDAC? High breakover voltage Greater current handling capacity Low input resistance Both a and b Hint2 parameters.66). SYDIAC stands for ________? Silicon Thyristor DIAC Selinium Thyristor DIAC Silicon Thermo DIAC Silicom Thermo DIAC HintSYDIAC stands for Silicon Thyristor DIAC.67). Which of the following are the applications of DIAC? Dimmers Motor speed controllers AC lamp All the above Hint3 applications.68). Oscillation takes place in ____ systems? Mechanical Electrical Chemical Electronic HintPhysical motion.69). Which of the following are the applications of electrical based oscillation? Astable multivibrator Blocking oscillator Clapp oscillator All the above Hint3 applications. Read more about Oscillator.70). Which of the following is the power based semiconductor device? Switch Rectifier IC All the above Hint3 types.71). A power based semiconductor device is used in _____ mode? Commutation mode Isolation mode Saturation mode Active mode HintThe process of turning-off a thyristos.72). Which of the following are the applications of linear power based circuits? Voltage regulators Audio amplifiers Radio frequency amplifiers All the above Hint3 applications.73). A thyristor is a _____ type of semiconductor device? Solid Liquid Gas All the above HintFirm and stable in shape.74). A thyristor has _____ number if layers? 1 2 3 4 HintEven number.75). A thyristor acts as _____ switch? Mono stable Bistable Unstable Both a and c HintAn electronic circuit which has two stable states.Semiconductor Device Important Questions for Interviews76). A thyristor is a ____ component? Active Passive Source dependent Both b and c HintSource dependent.77). A thyristor has _____ number of pins? 1 2 3 4 HintOdd number.78). A thyristor operates in ____ number of states? 1 2 3 4 HintOdd number.79). In which of the following mode of thyristor, voltage is applied in direction of diode blocked? Reverse blocking mode Forward blocking mode Forward conducting mode Both a and c HintA small leakage current flows mode.80). In which of the following mode of thyristor, voltage is applied in direction of diode conduction? Reverse blocking mode Forward blocking mode Forward conducting mode Both a and c HintMode in which anode voltage is made positive with respect to the cathode.81). In which of the following mode thyristor diode is not triggered? Reverse blocking mode Forward blocking mode Forward conducting mode Both a and c HintMode in which anode voltage is made positive with respect to the cathode.82). In which of the following mode thyristor diode is triggered? Reverse blocking mode Forward blocking mode Forward conducting mode Both a and c HintMode in which anode voltage is made positive with respect to the cathode.83). In which of the following thyristor mode “holding current” is observed? Reverse blocking mode Forward blocking mode Forward conducting mode Both a and c HintAnode voltage is made positive with respect to the cathode,84). How many junctions are present in thyristor? 1 2 3 4 HintOdd number.85). A power based semiconductor devices are classified in to _____ types? 1 2 3 4 HintOdd number.86). Which of the following is the classification of 2 terminal power based semiconductor device? PIN diode BJT IGBT Thyristor HintMinimum number.87). Which of the following is the classification of 2 terminal power based semiconductor device? BJT IGBT Thyristor All the above Hint3 devices.88). Which of the following are the examples of majority carrier devices? PIN diode JFET BJT IGBT Hint3 devices.89). Which of the following are the examples of minority carrier devices? Schottky diode JFET Power MOSFET BJT Hint3 devices.90). Which of the following are the examples of 2 terminal devices? Diode Triode SCS Transistor HintPassive components.91). Which of the following are the examples of 3 terminal devices? Diode Triode Transistor Both b and c Hint3 devices.92). Which of the following are the examples of microprocessors? TMS 1000 Intel 4004 MC68000 All the above Hint3 examples.93). Which of the following are the examples of special purpose processors? DSP GPU Microcontrollers All the above Hint3 devices.94). DSP processor is used for _____ purpose? Signal processing Real time image rendering Integrating peripheral devices Both a and c HintFunctions for analyzing, interpreting, and manipulating analog and digital signals.95). GPU processor is used for _____ purpose? Signal processing Real time image rendering Integrating peripheral devices Both a and c HintGPU processor is used for real time image rendering process.96). A switch has ______ number of contacts? 1 2 3 4 HintEven number.97). ____ terms defines switch contact variations? Pole Throw Stand Both a and b Hint2 terms.98). A logic gate is implemented using ____? Boolean function Logic operation Mathematical function Both a and b Hint2 operations.99). Which of the devices can be represented using logic gate? Registers Multiplexers ALU All the above Hint3 components.100). Which of the following are the examples of compound logic gates? AOI OAI COI Both a and b HintBoth AOI – ANS-OR gate and OAI- OR AND gate are the examples of compound logic gates. Time is Up! Time's up
