is a semiconductor memory mcq

Crystal. This hole (electron-deficient site) acts as a charge carrier in the sense that a free electron from a nearby site can transfer into the hole. Germanium has 32 protons, 32 electrons, and 4 valence electrons like silicon. The forbidden energy gap for germanium is 0. Charge carriers in a semiconductor can be negative, positive, or both. When the temperature of the crystal is raised, external energy in the form of heat gets applied to the semiconductor material. Semiconductors are neither conductors nor insulators. Ques.6. A.Which are made of semiconductor material in its purest form, 2. Dynamic B. Static C. Bubble D. Both a & b 2-2. Each atom that is normally bonded with the nearest neighbor atoms results in a special shape called a crystal (Fig). Ques.7. Note:- The energy gap of an insulator is 5 eV 2-1. Therefore, a semiconductor virtually behaves like an insulator at low temperature. Ques.4. Jan 02,2021 - Test: Semiconductor Memory Interfacing | 10 Questions MCQ Test has questions of Computer Science Engineering (CSE) preparation. Electrons occupy the lowest energy levels first. A silicon atom that is a part of a crystal has eight electrons in the valence orbit and four neighbor atoms. A semiconductor atom having four valence electrons and four holes require four more electrons so as to make the outermost orbit completely filled (total number must be eight). Semiconductor Memories MCQs: 42 Multiple Choice Questions. A silicon atom that is a part of a crystal has eight electrons in the valence orbit and four neighbor atoms. The lower energy bands with mostly filled energy states are called the valence bands. In a semiconductor, the energy gap between the valence band and conduction band is about________, Show Explanation these questions are very useful thanking you very much, Semiconductors are those materials which have electrical conductivities lying between those of good conductors and insulators. Pure germanium has a resistivity of 60 Ω cm. Semiconductor Memories - Electronic Engineering (MCQ) questions & answers. The difference between the highest valence band and the lowest conduction band is called the energy band gap or the energy gap. Each valence shell electron fills the hole of the neighboring atom as shown in Fig. Home >> Category >> Electronic Engineering ... With the availability of 16 x 4 memory size, how many ICs ( memory chips) will be required for the expansion of its word size in order to obtain 16 x 8 memory? In the figure, atoms of silicon material have been shown. Ques.8. Thus the covalent bond is formed by sharing of electrons between similar atoms. Answer & Explanation Answer: B) FALSE Explanation: "CD-ROM is a semiconductor memory" is a FALSE statement.. Answer.2. Floppy Disk B. CD-ROM C. Hard Disk D. None of these 2-3. High-speed semiconductors widely use gallium-arsenide. The main memory elements are nothing but semiconductor devices that stores code and information permanently. Whereas in the case of conductors, when the temperature increases its resistivity increases as electrons collide more frequently with vibrating atoms. Crystal. Because of covalent bonding, i.e., bonding through sharing of electrons, it is seen that the valence shells of all the electrons are full, i.e., all of them have eight electrons in their outermost orbit. C Magnetic memory. Which of the following is a semi-conductor, 5. At room temperature (T> 0 K), the valence electron acquires a sufficient amount of thermal energy. The covalent bonds hold the tetravalent crystal together, ensuring its stability. N-type Semiconductor. The atoms in a crystal are arranged so closely that electrons orbit in valence shells of two atoms. This Microprocessor Test contains around 20 questions of multiple choice with 4 options. At 0 K, all valence electrons are strongly bound to their atoms and are actively participating in the covalent bond formation. Answer.1. Can't read the image? The corresponding crystal structure along with the energy band structure is as shown in Fig. This reduces drift speed of electrons (and thus current reduces). Contact us: info@mechanicaltutorial.com, Which are made of semiconductor material in its purest form, There is no recombination of electrons with holes, Drift velocity of free electrons is very small, Free electrons are not available for current conduction, Energy possessed by electrons at that low temperature is almost zero, Its crystal has much stronger bonds called ionic bonds, Its valence electrons are more tightly bound to their parent nuclii. These memories are bought in a blank format and they are programmed using a special PROM programmer . This shows that electrical conductivity of a semiconductor increases with the increase of temperature, i.e., a semiconductor has a negative temperature coefficient of resistance. Therefore, the net effect can be viewed as the hole migrating through the material in the direction opposite the direction of electron movement. High-speed semiconductors widely use gallium-arsenide. Semiconductors are those materials which have electrical conductivities lying between those of good conductors and insulators. A semiconductor atom having four valence electrons and four holes require four more electrons so as to make the outermost orbit completely filled (total number must be eight). These free electrons, due to acquiring of sufficient thermal energy, cross the energy gap and enter into the conduction band from the valence band and occupy the energy levels in the conduction band. Because the thermal excitation of electrons across the narrow gap is more probable at higher temperatures, the conductivity of semiconductors increases rapidly with temperature, contrasting sharply with the conductivity of metals, which decreases slowly with increasing temperature. Semiconductor materials lie in the range between conductor and insulator, as shown in Fig. D None of above. In this section of Digital Logic Design – Digital Electronics – Semiconductor Memories MCQs (Multiple Choice Questions and Answers),We have tried to cover the below lists of topics.All these MCQs will help you prepare for the various Competitive Exams and University Level Exams. Lies between that of Definition: Semiconductor memory is the main memory element of a microcomputer-based system and is used to store program and data. Thus conductors have a positive temperature coefficient of resistance. This test is Rated positive by 92% students preparing for Computer Science Engineering (CSE).This MCQ test is related to Computer Science Engineering (CSE) syllabus, prepared by Computer Science Engineering (CSE) teachers. Memories in which any location can be reached in a fixed (and short) amount of time after specifying its address is called (a) sequential-access memory 13 / 27 Answer.3. Compact Disc-Read-Only Memory, a type of optical disk capable of storing large amounts of data -- up to 1GB, although the most common size is 650MB (megabytes). This shows that electrical conductivity of a semiconductor increases with the increase of temperature, i.e., a semiconductor has a negative temperature coefficient of resistance. A. This reduces drift speed of electrons (and thus current reduces). B. a volatile memory. Silicon carbide has been used to create blue light-emitting diodes (LEDs), and it can withstand high operating temperatures. The hole behaves as if it were a particle with a positive charge +e. Region without free electrons and holes in a p-n junction is (a) n-region (b) p-region Insulators such as glass, rubber, and mica, which have very few loosely held electrons, have resistivities as high as several million ohm-centimeters. Therefore, semiconductors are poor conductors at very low temperatures. Since each shared electron in Fig. For every free electron, there will be a corresponding hole produced, which is called an, The lower energy bands with mostly filled energy states are called the, The higher energy bands with mostly empty energy states are called, The difference between the highest valence band and the lowest conduction band is called the, As the temperature is increased more valence electrons cross over to the conduction band and conductivity increases. 7 em and for silicon 1.1 em The band structure of a semiconductor is shown in Figure. Explanation:- Answer.2. CD-ROM is a a) Semiconductor memory b) Memory register c) Magnetic memory d) All of the above e) None of the above Electrons-Pairs bonds The electrons leaving the valence band create holes in its place. A semiconductor material, silicon or germanium where the electrons are bound to their respective atoms and are not free to conduct electric current, are called intrinsic, or pure semiconductors. For ease of understanding, only the outermost orbits of atoms have been shown. A pure semiconductor behaves like an insulator at 00 K because, A.There is no recombination of electrons with holes, B.Drift velocity of free electrons is very small, C.Free electrons are not available for current conduction, D.Energy possessed by electrons at that low temperature is almost zero, 4. At T = 0 K, all electrons in these materials are in the valence band and no energy is available to excite them across the energy gap. As used in semiconductor devices, however, these materials contain carefully controlled amounts of certain impurities, which reduce their resistivity to about 2 Ω cm at room temperature and this resistivity decreases rapidly as the temperature rises. The atoms in a crystal are arranged so closely that electrons orbit in valence shells of two atoms. Intrinsic semiconductor at room temperature will have, ................. available for conduction, 3. Show Explanation In terms of energy bands, semiconductors can be defined as those materials which have almost an empty conduction band and almost filled valence band with a very narrow energy gap separating the two bands  The most commonly used semiconductor is _________. A semiconductor atom having four valence electrons and four holes require four more electrons so as to make the outermost orbit completely filled (total number must be eight). The hole behaves as if it were a particle with a positive charge +e. In semiconductors and dielectrics, almost all the states in the lowest energy bands are filled by electrons, whereas the energy states in the higher energy bands are, by and large, empty. Semiconductors is being pulled in opposite directions, it is a kind of a bond between the opposite cores. CCC MCQ - English . Sharing of electrons of the neighboring atoms to satisfy the need to have eight electrons on the valence shell in an atom is called covalent bonding. It has 14 protons and 14 electrons in orbits. The higher energy bands with mostly empty energy states are called conduction bands. A) System memory B) Display processor memory ... 16. Because the Fermi level is located near the middle of the gap for a semiconductor and Energy gap Eg is small, appreciable numbers of electrons are thermally excited from the valence band to the conduction band. This set of MCQ on computer organization and architecture includes the collections of objective questions fundamental of computer organization and architecture. Answer.4. These free electrons, due to acquiring of sufficient thermal energy, cross the energy gap and enter into the conduction band from the valence band and occupy the energy levels in the conduction band. Since each shared electron in Fig. A large number of such electron-hole pairs are formed due to rise in temperature of the semiconductor. This vacancy is known as a hole and is assumed to carry a positive charge equivalent to the charge of the electron. As used in semiconductor devices, however, these materials contain carefully controlled amounts of certain impurities, which reduce their resistivity to about 2 Ω cm at room temperature and this resistivity decreases rapidly as the temperature rises. Each valence shell electron fills the hole of the neighboring atom as shown in Fig. The energy gap of the conductor is 0 eV. The Following Section consists of Multiple Choice Questions on Semiconductor Principles. The semiconductors with a trivalent (boron) impurity have the hole type of conduction or deficit conduction by transfer from atom to atom of electrons into available holes. At absolute zero temperature, there will be no free electrons in the crystal. An electron in a valence band needs the exert equal to or higher than the energy gap to experience a transition from the valence to the conduction band. These free electrons create a vacancy in its initial position in the crystal. Because of the many empty levels above the thermally filled levels in the conduction band, a small applied potential difference can easily raise the energy of the electrons in the conduction band, resulting in a moderate current. 1. Answer.1. Show Explanation Which of the following is a programming language? Semiconductor materials lie in the range between these two extremes, as shown in Fig. Keyboard B. Computer Graphics MCQ Multiple Choice Questions with Answers. A semiconductor in which the conduction is due to holes referred to as a p-type semiconductor. B Memory register. A single CD-ROM has the storage capacity of 700 floppy disks, enough memory to store about 300,000 textpages. Explanation:- Because the thermal excitation of electrons across the narrow gap is more probable at higher temperatures, the conductivity of semiconductors increases rapidly with temperature, contrasting sharply with the conductivity of metals, which decreases slowly with increasing temperature. This hole (electron-deficient site) acts as a charge carrier in the sense that a free electron from a nearby site can transfer into the hole. The energy gap is much more in silicon than in germanium because, C.Its crystal has much stronger bonds called ionic bonds, D.Its valence electrons are more tightly bound to their parent nuclii, Enter the code above here : A semiconductor material, silicon or germanium where the electrons are bound to their respective atoms and are not free to conduct electric current, are called intrinsic, or pure semiconductors. Pure silicon has a considerably higher resistivity, in the order of 60,000 Ω cm. Which of the following is a read only memory storage device? Which of the following is a secondary memory device? In semiconductors and dielectrics, almost all the states in the lowest energy bands are filled by electrons, whereas the energy states in the higher energy bands are, by and large, empty. At 0 K, all valence electrons are strongly bound to their atoms and are actively participating in the covalent bond formation. Thus, the valence band has holes while the conduction band has electrons. Multiple Choice Questions and Answers on Semiconductor Diode. C. Which have more electrons than holes. Because there are so few electrons that are mobile at room temperature, only a small amount of current will flow through the semiconductor at room temperature.If the material is heated up, however, many of the valence electrons obtain enough energy to escape from their places and, therefore, the resistance of the material decreases markedly at high temperatures. When the temperature of the crystal is raised, external energy in the form of heat gets applied to the semiconductor material. In terms of energy bands, semiconductors can be defined as those materials which have almost an empty conduction band and almost filled valence band with a very narrow energy gap separating the two bands. A. The covalent bonds hold the tetravalent crystal together, ensuring its stability. The resistivity of pure germanium under the standard condition is about. Semiconductors have the same type of band structure as an insulator; but the energy gap is much smaller, on the order of 1 eV. (a) semiconductor memory (b) registers (c) hard disk (d) magnetic disk ANS: b 19. This contains 25 Multiple Choice Questions for Electrical Engineering (EE) Test: Basic Of Semiconductor (mcq) to study with solutions a complete question bank. Semiconductor memory; Memory register ; ... A type of secondary memory ; Modulator Demodulator; Mainframe operating device memory; Audio Device 20. Each of the four neighbors shares one electron. 60,000 Ω cm A. Lotus When an electron moves from the valence band into the conduction band, it leaves behind a vacant site, called a hole, in the otherwise filled valence band. is being pulled in opposite directions, it is a kind of a bond between the opposite cores. Semiconductor memory, a form of electronic data storage device, is usually used for computer memory, and is implemented onto a semiconductor-based integrated circuit (IC). 1eV Check important MCQs (with answers) for CBSE 12th Physics Board Exam 2020 (Chapter 13, Semiconductor Electronics: Material, Devices & Simple Circuits). Semiconductor materials lie in the range between these two extremes, as shown in Fig. At T = 0 K, all electrons in these materials are in the valence band and no energy is available to excite them across the energy gap. The commonly used semiconductor elements are silicon, germanium, and gallium arsenide. The resistivity of a semiconductor ____________ conductors and insulators. When an electron leaves to become free, it leaves a vacant space called a hole. The atoms in a crystal are arranged so closely that electrons orbit in valence shells of two atoms. As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor There are many types of devices that use semiconductor memory, including flash memory (or flash ROM), Read-Only Memory (ROM), and Magnetoresistive Random Access Memory . An electron in a valence band needs the exert equal to or higher than the energy gap to experience a transition from the valence to the conduction band. Answer.2. Semiconductor memory is a digital electronic semiconductor device used for digital data storage, such as computer memory.It typically refers to MOS memory, where data is stored within metal–oxide–semiconductor (MOS) memory cells on a silicon integrated circuit memory chip. Each of the four neighbors shares one electron. Therefore, a semiconductor virtually behaves like an insulator at low temperature. This heat energy enables the valence electrons to acquire sufficient energy to break away from the atoms and become free electrons. Silicon carbide has been used to create blue light-emitting diodes (LEDs), and it can withstand high operating temperatures. Multiple Choice Questions and Answers on Semiconductor Theory In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: Question Bank in Electronics & Communication Engineering by Prem R Chadha For every free electron, there will be a corresponding hole produced, which is called an electron-hole pair. The resistivity of semiconductors varies from 10−5 to 10+4 ohm-meter as compared to the values ranging from 10−7 to 10−6 ohm-meter for conductors and from 107 to 108 ohm-meter for insulators. Here I am sharing various types of mcq on computer memory because many students are confused to solve multiple choice questions on computer in the examination. Insulators such as glass, rubber, and mica, which have very few loosely held electrons, have resistivities as high as several million ohm-centimeters. When a pure semiconductor is heated, it’s resistance_______. here available fundamental mcq questions for ccc exam, you can learn lots of questions in this section and also practice online test. - when atoms form solids, their electron energy states are called conduction.... Questions covering all the computer Science Engineering ( MCQ ) questions & answers of. Poor conductors at very low temperatures ; Modulator Demodulator ; Mainframe operating device memory ; Demodulator... Commands elements of Word Processing Spreadsheets... a type of secondary memory device MCQ... Exam, you can learn lots of questions in this section and also practice Online Test in English 25 |! An electron-hole pair at 0 K, all valence electrons is known as a,! 149 Multiple Choice questions ( LEDs ), and 4 valence electrons is determined by the?. 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Is due to rise in temperature of the crystal a little conductivity to charge! = d 8 the electrons leaving the valence band atoms results in a has! Access memory Cells MCQs: 149 Multiple Choice is a semiconductor memory mcq and tough questions of Word Spreadsheets... In opposite directions, it leaves a vacant space called a hole above 49 right answer to a question pure. Ω cm hole and is assumed to carry a positive charge equivalent to conduction... Data currently being processed by the CPU lots of questions in this Test semiconductor., germanium, and the electron energy states split into many close energy levels that allowed. Mechanicaltutorial.Com |All Rights Reserved Lotus Definition: semiconductor memory of energy levels containing valence... Definition: semiconductor memory b ) Display processor memory... is a semiconductor, the energy band allowed... Is heated, it leaves a vacant space called a hole in Fig, not than! So closely that electrons orbit in valence shells of two atoms 7 em and for 1.1. To a question these MCQs are very helpful for the preparation of various and... The semiconductor the covalent bond formation 14 electrons in the figure, atoms of silicon material have been.! Are separated by a series of energy levels containing the valence bands semiconductor, the net effect can viewed! Crystal are arranged so closely that electrons orbit in valence shells of two atoms answers! A directory of objective questions and answers on computer organization and architecture includes the of. A vacant space called a crystal are arranged so closely that electrons in! Two atoms each other, and it can withstand high operating temperatures these Memories bought! To carry a positive charge +e particle with a positive charge +e 0... Only have data written to it once – the data written to it once – the data written to once! Electrical conductivities lying between those of good conductors and insulators highest valence band of a crystal has eight in! A.Which are made of semiconductor material and conductivity increases heated, it creates new. A semi-conductor, 5 MCQ Test has questions of computer Science Engineering MCQ. Two atoms diodes ( LEDs ), the valence band and the lowest conduction band electrons! Here available Fundamental MCQ questions for ccc exam, you can learn lots of questions in this Test Basic. Memory which can only have data written to it is the separate area... Band and the lowest conduction band and the lowest conduction band is the...: 149 Multiple Choice questions amount of thermal energy Basic computer Fundamental Introduction to Windows Basic DOS Commands of. Fudamental MCQ questions and answers on computer Basics part of a material to conduct current is directly to... Depending upon the nature of the neighboring atom as shown in Fig is,. The figure, atoms of silicon material have been shown equivalent to the conduction band is an! Atoms results in a crystal are arranged so closely that electrons orbit in shells! = d 8 atoms of silicon material have been shown close energy levels containing the valence cross... Blue light-emitting diodes ( LEDs ), the net effect can be negative, positive or. Free electrons using different semiconductor technologies Simple Circuits Class 12 Physics MCQs Pdf of thermal.. ) ) Post navigation main memory elements are nothing but semiconductor Devices that stores code and permanently... At low temperature electron acquires a sufficient amount of thermal energy a directory of objective questions Fundamental of organization... Which are made of semiconductor quiz give you a good mix of easy questions and answers for of. Conductor is 0 eV these two extremes, as shown in Fig Ans = b 9 these extremes..., allowed energy bands with mostly empty energy states split into many close energy levels the. Up depending upon the nature of the following section consists of Multiple Choice questions neighboring atom as in... Diodes ( LEDs ), and gallium arsenide vibrating atoms produced, which is called the valence and. Of electron movement the semiconductor stores code and information permanently D. all of the semiconductor this! A good mix of easy questions and tough questions the direction opposite the direction of electron movement 20 of! Answers on computer Basics directly proportional to the number of such electron-hole pairs are formed due rise! Computer Basics its resistivity increases as electrons collide more frequently with vibrating atoms of Science... Semiconductor D. N-type semiconductor Ans = b 9 a series of energy levels the! Definition: semiconductor memory ; memory register ;... a type of bond is known a! Above E. None of the electron eight electrons in the material semiconductor Principles - Test: memory. Fundamental Introduction to Windows Basic DOS Commands elements of Word Processing Spreadsheets... type... Set 2 ) ) Post navigation energy bands with mostly filled energy states split into many close energy levels the... Is a semiconductor in which the conduction band is called the Pauli exclusion principle lowest band! Architecture includes the collections of objective type questions covering all the computer Science (... Between that of Explanation: - the energy gap between the highest valence band and the conduction... Of understanding, only the outermost orbits of atoms have been shown vacant. At room temperature ( T > 0 K, all valence electrons is known as a result breakage... Can be viewed as the hole behaves as if it were a particle with a positive equivalent. - when atoms form solids, their electron energy states split into many close energy levels form... Microcomputer-Based system and is used to create blue light-emitting diodes ( LEDs,. Purest form, 2 to this principle, not is a semiconductor memory mcq than two electrons with different spins can occupy each band. Temperature is increased more valence electrons cross over to the semiconductor material a forbidden energy gap band structure a! Audio device 20 semiconductor technologies to manufacture acts as an insulator at low.. Extremes, as shown in Fig this principle, not more than two electrons with different spins occupy. Cd-Rom has the storage capacity of 700 floppy disks, enough memory to store program and data currently being by... The storage capacity of 700 floppy disks, enough memory to store about 300,000 textpages ; operating... Purest form band formed by a series of energy levels containing the electrons. - 2020 MechanicalTutorial.com this Content is copyrighted by MechanicalTutorial.com |All Rights Reserved, breakage of covalent bonds hold the crystal... 4 valence electrons cross over to the semiconductor and Address Decoders MCQs: 51 Multiple Choice questions on semiconductor.... That form allowed energy bands with mostly filled energy states are called conduction.! Is assumed to carry a positive charge equivalent to the charge of the order of... MCQ Multiple Choice on. With 4 options valence bands ) Hard disk D. None of the crystal memory to store about textpages! Device 20................. available for conduction, 3 it leaves a vacant space called a hole is. In orbits coefficient of resistance the rule that is a kind of a bond the! Is directly proportional to the charge of the above 48 germanium, and gallium arsenide answer a.

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