1-INTRODUCTION:- The increasing demand of electrical power in cities and industrial centres necessitates the installation of a compact and efficient distribution and transmission network. High voltage gas insulated switchgear (GIS) is ideal for such applications. The range of application of SF₆ Gas Insulated Switchgear extends from voltage ratings of 72.5 kV up to 800 kV with breaking currents of up to 63 kA‚ and in special cases up to 80 kA. Both small transformer substations and large load- centre
Premium Circuit breaker Transformer
TRANSISTOR The name is transistor derived from ‘transfer resistors’ indicating a solid state Semiconductor device. In addition to conductor and insulators‚ there is a third class of material that exhibits proportion of both. Under some conditions‚ it acts as an insulator‚ and under other conditions it’s a conductor. This phenomenon is called Semi-conducting and allows a variable control over electron flow. So‚ the transistor is semi conductor device used in electronics for amplitude. Transistor
Premium Bipolar junction transistor Semiconductor Transistor
a trademarked brand of closed-cell extruded polystyrene foam currently made for thermal insulation and craft applications examples of these Styrofoam are disposable coffee cups‚ coolers‚ or cushioning material in packaging. Styrofoam is widely used for insulator and packaging. The disposal of these products creates environmental pollution because of their non-degradable nature. Because of this problem‚ people think a possible way to reduce the disposal of Styrofoam and recycle this product. Styrofoam is
Premium Polystyrene
controlled during this investigation. (1) Alice rubs the Perspex ruler with the silk cloth to give it a negative charge. Were electrons added to or removed from the Perspex ruler during this process? (1) Is the ruler an electrical conductor or insulator? Explain your answer. (2) Alice then brings the ruler close to the ball without touching it. She notices that the ball is attracted to the ruler. Explain why the ball is attracted to the ruler. What is the name of this process? (3) Draw
Premium Atom Electron Electric charge
Transparent electronics is a emerging technology‚ which is satisfying the requirements of everything invisible or multi-purpose objects. Before going further let me give an example: You are travelling in a car and you want to watch a movie or video play. Now the glass shields ie window panels will turn into a tv screen and this is possible with this technology. This is helpful when the driver can’t take away his eyes from road but still want to watch out a map of route. Then front window panel
Premium Semiconductor
Conduction Conduction is the transfer of heat by direct contact of particles of matter. The transfer of energy could be primarily by elastic impact as in fluids or by free electron diffusion as predominant in metals or phonon vibration as predominant in insulators. In other words‚ heat is transferred by conduction when adjacent atoms vibrate against one another‚ or as electrons move from atom to atom. Conduction is greater in solids‚ where atoms are in constant contact. In liquids (except liquid metals) and
Premium Heat transfer Heat
by different natural sources i.e (Hydro electrical plant‚ thermal power plant‚ nuclear power plants); Transfer the electrical power by using transmission and distribution lanes. And what are the main parts in transmission lines. i.e (conductors‚ insulators‚ poles) etc.‚ define grid input and grid out put. And also it consist of history about transmission lines distribution lines‚ transmission lines and distribution line figures‚ are what are the main protective equipments in power system.
Premium Nuclear power Electricity generation Electric power transmission
Thermodynamics Section Review 9A: 1. Scientists believed that the caloric was a material but mainly that it was an invisible fluid consisting of self-repelling particles. Two examples include how gases expand according to Newton’s laws‚ and determining the speed of sound in air. 2. The first person to successfully challenge the caloric theory was Benjamin Thompson. Benjamin observed that a dull boring bit could generate more hat than needed to melt the entire cannon barrel. 3. The significance
Premium Temperature Thermodynamics
FIRST PERIODICAL EXAM GRADE 7 NAME: SCORE: YEAR AND SECTION: DATE: I. MULTIPLE CHOICE. Circle the letter of the correct answer. 1. What is the set of procedures that can be used to explain and predict events or phenomena? A. Scientific discovery B. Scientific method C. Scientific notation D. Scientific thinking 2. Which of the following pairs of elements make up the salt compound? A. chlorine and oxygen B. oxygen and hydrogen C. sodium and chlorine D. sodium and hydrogen 3. What
Premium Education High school College
weather wood‚ thus providing more longevity to the house; wood helps in trapping heat so the heat that is emitted from he lights in the houses during winter is captured by wood and stored in it‚ works as cold insulator‚ allows building layered walls that helps in installing a layer of cold insulator within the walls References: [1] http://home-and-constuctions.blogspot.ca/2010/02/wooden-houses.html [2]http://en.wikibooks.org/wiki/Technologies_for_Rural_Development/Building_houses# Housing_for_Cold_Climates
Premium Heat Wood Construction