Semiconductor Device Question & Answers January 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 Hint 2). On which of the following materials properties electronic devices depends on? Silicon Germanium Gallium All the above Hint 3). ____ is a solid based semiconducting substance? Organic Crystal Liquid All the above Hint 4). Which of the following device where replaced by semiconductor device? Vacuum tubes Hygrometers Barometers Pipet Hint 5). Semiconductor device perform conduction in _____ state? Solid Liquid Gas All the above Hint 6). A vacuum tube perform conduction in ____ state? Solid Liquid Thermionic All the above Hint 7). In how many packages semiconductor devices are manufactured? 2 3 4 5 Hint 8). Which of the following are the examples of discrete devices? Radio receiver Oscillator Amplifier All the above Hint Read more about Radio. 9). IC stands for ___? Integrated Circuits Intellect circuit All the above Hint 10). An IC is also called ___? Monolithic IC Micro chip Chip All the above Hint 11). An IC comprises of _____ on the chip? Electronic circuits Electric elements Semiconductor material Both a and c Hint 12). ______ devices are integrated in huge quantity on an IC? Switched Transistors MOSFET All the above Hint 13). MOSFET stands for _____? Metal oxide FET Metal oxygen FET Main Oxide FET All the above Hint 14). A MOST FET is a ____ device type? Semiconductor Discrete Continuous All the above Hint 15). Which of the following is the result form obtained from MOSFET? Small in magnitude Faster Less expensive All the above Hint 16). ____ properties of IC design lead to rapid adoption of standardized IC? Capability Reliability Building block All the above Hint 17). Which of the following are the electronic device application of IC? TV Computer Mobile All the above Hint Read more about Computer. 18). Which of the following are small IC applications? Modems Microprocessors All the above Hint 19). A microcontroller has ___ number of CPUs? 1 2 3 Both b and c Hint 20). Program memory in microprocessor comprises of _____? Ferroelectric RAM NOR flash OTP ROM All the above Hint 21). A semiconductor wafer is also called ____? Substrate Gate Source All the above Hint 22). Behavior of semiconductor device depends on _____? Doping levels Carrier concentration Polarity Both a and b Hint 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 Hint 24). An intrinsic type semiconductors is also called ____? Pure semiconductor i-type semiconductor Un-doped semiconductor All the above Hint 25). The process of doping is done for improving ____ properties? Structural Optical Electrical All the above Hint Semiconductor Device Interview Questions and Answers 26). Conduction in semiconductor device occurs due to ______? Charge carriers Holes Electrons All the above Hint 27). Which of the following are the semiconductor device? Diode Transistor LED All the above Hint Read more about LED. 28). A diode is made up of _____junction? P N PN All the above Hint 29). A P-type has majority as ______ carriers? Holes Electrons Positive Both a and c Hint 30). A N-type has majority as ______ carriers? Holes Electrons Positive Both a and c Hint 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 Hint 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 Hint 33). In PN diode forward bias condition the barrier size is ______? Wider Thicker Thinner Both a and b Hint 34). In PN diode reverse bias condition the barrier size is ______? Wider Thicker Thinner Both a and b Hint 35). The conductivity in semiconductor device can be controlled by ______? Inducing electric field Inducing magnetic field Inducting mechanical pressure All the above Hint 36). A diode is constructed with _____ number of pn junctions? 1 2 3 4 Hint 37). A diode has ____ number of terminals? 1 2 3 4 Hint 38). A diode is a ____ element? Active Passive Source dependent Both a and b Hint 39). Which of the following is the units of resistance? Ohms Volts Amperes Farads Hint 40). A photo diode has ____ number of terminals? 1 2 3 4 Hint 41). A photo diode is exposed to ______ rays? UV X Light Both a and b Hint 42). A photo diode converts _____ energy to current? Light Gas Liquid Vapor Hint 43). A photo diode operates in _____ bias? Forward Reverse Both a and b Zero Hint 44). A photo diode is of ____ structure? PIN PN junction Both a and b S shape Hint 45). Identify the semiconductor device symbol displayed below. Diode Photo diode Zener diode Varactor diode All the above Hint 46). Identify the semiconductor device symbol displayed below. Diode Photo diode Zener diode Varactor diode All the above Hint Read more about Zener Diode. 47). Identify the semiconductor device symbol displayed below. Diode Photo diode Zener diode Varactor diode All the above Hint Read more about Varactor Diode. 48). In photo diode ____ terminal is provided with positive charge? Anode Cathode Non inverting terminal Both a and c Hint 49). In photo diode ____ terminal is provided with negative charge? Anode Cathode Non inverting terminal Both a and c Hint 50). Which of the following substance are used for developing photo diode? Silicon Germanium Mercury Cadmium tellurium All the above Hint Semiconductor Device Quiz Questions and Answers. 51). A micro controller is a _____device? Remote Computer Storage Sensor Hint 52). Which of the following are the memory elements of microcontroller? NOR flash Ferroelectric RAM OTP ROM All the above Hint 53). Which of the following are the advanced peripherals interfaced to microcontrollers? Wi-Fi modules Coprocessors GPU All the above Hint 54). Which of the following are the applications of microcontrollers? Automobile engines Embedded systems Toys All the above Hint 55). A GPU is designed to alter _______ component of processor? Memory Ports Controller Bus Hint 56). Which of the following are the applications of GPU? Mobile phones Game consoles Workstations All the above Hint 57). DIAC stands for ______? Diode for Alternative Current Diode for App Current Di for Alternative Current Divide for App Current Hint 58). A DIAC is a _____ type of component? Active Passive Source dependent Both b and c Hint 59). A DIAC has _____ number of pins? 1 2 3 4 Hint 60). A DIAC has ___ number of layers? 1 2 3 4 Hint 61). Which of the following is the breakover voltage of DIAC? 30V 40V 2V 3V Hint 62). Which of the following is not a part of DIAC? Source Gate Drain All the above Hint 63). A DIAC is also called ______ diode? Symmetrical trigger Asymmetrical trigger Systematic trigger Both b and c Hint 64). DIACS are ____ directional devices? Bi Tri Uni Multi Hint 65). Which of the following are the characteristics of SIDAC? High breakover voltage Greater current handling capacity Low input resistance Both a and b Hint 66). SYDIAC stands for ________? Silicon Thyristor DIAC Selinium Thyristor DIAC Silicon Thermo DIAC Silicom Thermo DIAC Hint 67). Which of the following are the applications of DIAC? Dimmers Motor speed controllers AC lamp All the above Hint 68). Oscillation takes place in ____ systems? Mechanical Electrical Chemical Electronic Hint 69). Which of the following are the applications of electrical based oscillation? Astable multivibrator Blocking oscillator Clapp oscillator All the above Hint Read more about Oscillator. 70). Which of the following is the power based semiconductor device? Switch Rectifier IC All the above Hint 71). A power based semiconductor device is used in _____ mode? Commutation mode Isolation mode Saturation mode Active mode Hint 72). Which of the following are the applications of linear power based circuits? Voltage regulators Audio amplifiers Radio frequency amplifiers All the above Hint 73). A thyristor is a _____ type of semiconductor device? Solid Liquid Gas All the above Hint 74). A thyristor has _____ number if layers? 1 2 3 4 Hint 75). A thyristor acts as _____ switch? Mono stable Bistable Unstable Both a and c Hint Semiconductor Device Important Questions for Interviews 76). A thyristor is a ____ component? Active Passive Source dependent Both b and c Hint 77). A thyristor has _____ number of pins? 1 2 3 4 Hint 78). A thyristor operates in ____ number of states? 1 2 3 4 Hint 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 Hint 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 Hint 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 Hint 82). In which of the following mode thyristor diode is triggered? Reverse blocking mode Forward blocking mode Forward conducting mode Both a and c Hint 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 Hint 84). How many junctions are present in thyristor? 1 2 3 4 Hint 85). A power based semiconductor devices are classified in to _____ types? 1 2 3 4 Hint 86). Which of the following is the classification of 2 terminal power based semiconductor device? PIN diode BJT IGBT Thyristor Hint 87). Which of the following is the classification of 2 terminal power based semiconductor device? BJT IGBT Thyristor All the above Hint 88). Which of the following are the examples of majority carrier devices? PIN diode JFET BJT IGBT Hint 89). Which of the following are the examples of minority carrier devices? Schottky diode JFET Power MOSFET BJT Hint 90). Which of the following are the examples of 2 terminal devices? Diode Triode SCS Transistor Hint 91). Which of the following are the examples of 3 terminal devices? Diode Triode Transistor Both b and c Hint 92). Which of the following are the examples of microprocessors? TMS 1000 Intel 4004 MC68000 All the above Hint 93). Which of the following are the examples of special purpose processors? DSP GPU Microcontrollers All the above Hint 94). DSP processor is used for _____ purpose? Signal processing Real time image rendering Integrating peripheral devices Both a and c Hint 95). GPU processor is used for _____ purpose? Signal processing Real time image rendering Integrating peripheral devices Both a and c Hint 96). A switch has ______ number of contacts? 1 2 3 4 Hint 97). ____ terms defines switch contact variations? Pole Throw Stand Both a and b Hint 98). A logic gate is implemented using ____? Boolean function Logic operation Mathematical function Both a and b Hint 99). Which of the devices can be represented using logic gate? Registers Multiplexers ALU All the above Hint 100). Which of the following are the examples of compound logic gates? AOI OAI COI Both a and b Hint Time is Up! Time's up
