Electrical technology – assignment 4 Properties of electrical materials and Effective use of technology P.5. Describe the properties and a typical application of a solid and a liquid or gas electrical conductor. A conductor is a material that allows free movement of electrons and therefore allows easy flow of electricity. Most conductors are metals. A common metal used as a conductor in electrical technology is aluminium. It is used quite a lot as it cheap‚ lightweight and in abundance compared
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impact‚ low moisture absorption‚ good wave transmission‚ and electrical insulation [2]. This does not preclude that there are many materials have been used for this purpose such as; polytetrafluoroethylene (PTEF)‚ polyarylether ether ketone (PEEK)‚ Polyethylene terephthalate (PET)‚ polyoxymethylene
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International Journal of Automotive and Mechanical Engineering (IJAME) ISSN: 1985-9325(Print); ISSN: 2180-1606 (Online); Volume 4‚ pp. 471-480‚ July-December 2011 ©Universiti Malaysia Pahang METAL MATRIX COMPOSITE BRAKE ROTOR: HISTORICAL DEVELOPMENT AND PRODUCT LIFE CYCLE ANALYSIS A.A. Adebisi*1‚ M.A. Maleque1‚ M.M. Rahman2 Department of Manufacturing and Materials Engineering International Islamic University Malaysia‚ Kuala Lumpur Malaysia 2 Faculty of Mechanical Engineering‚ Universiti Malaysia
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ELECTRICAL SUBSTATION A substation is a part of an electrical generation‚transmission and distribution system. Substations transform voltage from high to low‚ or the reverse‚ or perform any of several other important functions. Electric power may flow through several substations between generating plant and consumer‚ and its voltage may change in several steps. Substations may be owned and operated by a transmission or generation electrical utility‚ or may be owned by a large industrial or commercial
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Overview of CES EduPack 2011 Materials and Process Information Science Notes Interactive Materials Property Charts Three levels of database‚ from an introductory teaching resource to a comprehensive project tool covering 3‚000 materials. Textbook-style explanations with further reading references to books by Ashby‚ Askeland‚ Callister‚ Shackelford and more... Unique tools to compare and analyze properties and to select materials and processes. Eco Audit Tool Specialist Databases
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area A maintains a temperature difference ∆T‚ then the heat transfer rate per unit time by conduction through the wall is found to be: Q α A ∆T/∆x where ∆x = (xb – xa ) And the electrical heating Q = V.I If the material of the wall is homogeneous and has a thermal conductivity C (the constant of proportionality) then: Q = C ∆T/∆x where ∆T = (Ta – Tb ) If the surfaces of the heated and cooled sections are attached tightly together‚ and are in
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Electronics and Electrical Engineering Course Structure and Syllabus for BTech in Electronics and Electrical Engineering (to be applicable from 2010 batch onwards) Course No. CH101 CH110 EE101 MA101 ME110/ PH 110 ME 111 PH101 SA 101 Course Name Semester - 1 Chemistry Chemistry Laboratory Electrical Sciences Mathematics - I Workshop /Physics Laboratory Engineering Drawing Physics - I Physical Training -I NCC/NSO/NSS 3 0 3 3 0 0 2 0 0 11 Semester 3 MA201 EE200 EE201 EE220 HS2xx EE202 SA201 Mathematics
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charts can give good estimates on these values they are unable to give completely valid answers. This is because when measuring the current carrying capacity you must also consider: voltage drop‚ insulation temperature limit‚ thickness‚ thermal conductivity‚ and air convection and temperature. The fusing current for a wire
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Thermal Conductivity of Metals and Non-metals 1. Introduction Thermal conductivity is a physical property of materials of great importance. Unlike some physical properties‚ however‚ thermal conductivity cannot be directly measured. In order to determine a material’s thermal conductivity‚ intermediate quantities must be determined from which the conductivity may be ultimately calculated. The objective of this lab was to determine the thermal conductivity of metals. To do so‚ it was necessary to study
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while excluding open loops. Direct exchange systems are significantly more efficient and have potentially lower installation costs than closed loop water systems. Copper’s high thermal conductivity contributes to the higher efficiency of the system‚ but heat flow is predominantly limited by the thermal conductivity of the ground‚ not the pipe. The main reasons for the higher efficiency are the elimination of the water pump (which uses electricity)‚ the elimination of the water heat exchanger (which
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