Power electronics Mid-1 Objective exam 2011 1.When UJT is used for triggering an SCR‚ the wave shape of the voltage obtained from UJT firing circuit is a a) Sine wave (b) saw tooth wave (c)trapezoidal wave (d) Square wave 2. In a thyristor circuit‚ the angle of conduction can be changed by changing (a) anode Voltage (b) Anode Current (c) Forward Current rating (d)gate Current 3. Freewheeling diodes are mainly used for (a) Better utilization factor (b) di/dt protection
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BASIC DIODE ELECTRONICS INTRODUCTION TO DIODES The p-n Junction The p-n junction is a homojunction between a p-type and an n-type semiconductor. It acts as a diode‚ which can serve in electronics as a rectifier‚ logic gate‚ voltage regulator (Zener diode)‚ switching or tuner (varactor diode); and in optoelectronics as a light-emitting diode (LED)‚ laser diode‚ photodetector‚ or solar cell. In a relatively simplified view of semiconductor materials‚ we can envision a semiconductor as having two
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keep it simple science Ryde Secondary College‚ SL#710371 INDUSTRIAL CHEMISTRY What is this topic about? To keep it as simple as possible‚ (K.I.S.S.) this topic involves the study of: 1. THE CHEMICAL INDUSTRY 2. CHEMICAL EQUILIBRIUM 3. PRODUCTION OF SULFURIC ACID 4. PRODUCTION OF SODIUM HYDROXIDE 5. SOAP & DETERGENTS 6. THE SOLVAY PROCESS FOR Na2CO3 ...all in the context of the applications of Chemistry in human society. 1. THE CHEMICAL INDUSTRY The “Invisible” Industry Most people are familiar
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RAMS *Radio Frequency Identification Attendance Monitoring System* (ABSTRACT) This system is an electronic device which is use in attendance management system by faculty members. It provides robust‚ secure and automatic attendance administration in faculties. Radio Frequency Identification Attendance Monitoring System has programmed RFID software specifically for optimizing attendance tracking. Thus‚ combined RFID hardware with this software‚ it automates the whole system of faculty attendance
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Contents Foreword ........................................................................... iii Introductory note for teachers........................................... vii Teacher’s note on evaluation ............................................... x Unit One: Equality in Indian Democracy .......................... 2 Chapter 1: On Equality .................................................... 4 Unit Two: State Government ......................................... 16 Chapter 2: Role of the Government
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and computation of data becomes more and more obsolete. Today manual operations are gradually replaced by systematic procedures which eventually improve one’s productivity. It is for this reason that the researchers propose a teachers’ Attendance Monitoring System of Asian College of Technology that is more improved and more enhanced. This will provide the institution and the administration an automated system to be used for the daily records of instructor’s attendance place that will store and save
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slacking grip of the government and the introduction of satellite channels have helped towards promoting the free media environment in the country. History of media in India Media industry of the country is very diverse in nature. Both the print and electronic media enjoy great penetration in India. With improved infrastructure and affordability of computers the on-line media too is catching up fast. Hence‚ India presents great scope for E&M industry development. However‚ the development of media
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Financial intermediation and delegated monitoring Financial market is channelling funds from people have an excess of available to people who have a shortage. A well- functioning financial market makes great contribution to the high growth economy. The behaviour of business activities and consumers are also affected by the financial market. Financial intermediaries such as banks and other financial institutions make financial market operate properly. Those financial intermediations provide investment
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____________________________________________________________________________________________________________________ Alternating Current and Direct Current Generator Pedro Portela‚ João Sepúlveda‚ João Sena Esteves Department of Industrial Electronic University of Minho‚ Campus of Azurém‚ 4800-058 Guimarães‚ Portugal delfimpedrosa@gmail.com‚ sena@dei.uminho.pt Abstract. Spinning a wire loop within a uniform magnetic field in a convenient fashion induces a voltage between the loop terminals
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their school years. It is the school officials particularly the instructors‚ to maintain and monitor the student’s attendance‚ doing this task is not an easy job‚ because it should be done on a daily basis. But even if the schools do their job in monitoring and maintaining the students’ attendance‚ another task which is informing the parents or guardians of the student if the student missed or skipped a class. AMA Computer College Cabanatuan branch
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