relative permeability of the ring material =500 and neglect leakage and fringing. 3. A ring of mean diameter 21 cm and cross-section 10 cm2 is made up of semi-circular sections of cast steel and cast iron. If each joint has reluctance equal to an air gap of 0.2 mm as shown in Fig. find the Amp. turn required to produce a flux of 45*10− weber in the magnetic circuit. Take ur for steel and iron as 825 and 165 respectively: Neglect leakage and fringing 4. Two coils are wound on a toroidal
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POWER ELECTRONICS BULLETIN OF THE POLISH ACADEMY OF SCIENCES TECHNICAL SCIENCES‚ Vol. 59‚ No. 4‚ 2011 DOI: 10.2478/v10175-011-0061-7 Review and comparison of high efficiency high power boost DC/DC converters for photovoltaic applications J. DAWIDZIUK∗ Faculty of Electrical Engineering‚ Department of Automatic Control Engineering and Electronics‚ Bialystok University of Technology‚ 45D Wiejska St. 15-351 Bialystok‚ Poland Abstract. Recent environmental issues have accelerated the use of
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effects on the environment. Among the negative effects of tourism‚ the most important ones are inflation‚ financial leakage‚ infrastructure costs‚ and economic dependence. Political issues can also arise because of tourism. The countries should be aware of the negative effects of tourism in order to avoid them. Keywords: international tourism‚ environment‚ economic effect‚ leakage‚ tourist infrastructure. Table of Contents Introduction 2 The Negative and Positive Effects of Tourism 2 Positive
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this investigation is to gain a better understanding of the design of transformers and how through variations of materials and dimensions the flux leakage and consequentially the efficiency of the transformer can be affected. 2.2. Objectives The objectives of the investigation are: 1. To understand the variation in magnitude of the flux leakage in the area between the upper surface of the transformer coils and core. 2. To consider the flux variation an air gap in the centre member of
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1. Describe the role played by the following economic sectors: o Household They own the factors of production‚ which they supply to the market. The basic macroeconomic sector that includes the entire‚ wants and-needs-satisfying population of the economy. The household sector is the eating‚ breathing‚ consuming population of the economy. In a word "everyone‚" all consumers‚ all people. This sector includes everyone seeking to satisfy unlimited wants and needs. Members of the household sector
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explain how the size of the flows will change depending on the relative size of leakages and injections. [10 marks] ● leakages > injections: income flow becomes smaller ○ fewer goods and services are purchased ○ less output‚ less factors of productions needed ■ unemployment increases‚ income reduces ● leakages < injections: income flow becomes larger ○ produces more‚ more factors of productions purphased ○ unemployment falls‚ income increases Leakages: savings‚ taxes‚ imports Injections: Investment‚ government spending
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Notes 6.1 Introduction Chapter - 6 LPG Bottling Plants Over 100 million LPG consumers in the domestic sector in India are serviced through a network of 9365 LPG distributors who are getting supply from 181 LPG bottling plants located across the country. In 2007-08‚ India consumed a total of about 1170 TMT of LPG which is around 10% of the consumption of total petroleum products in the country. Out of the total LPG consumption during the year 2007-08‚ almost 75% was used for cooking‚ 17% as
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electrolytic capacitors. The introduced active clamp circuit recycles the energy stored in the leakage inductance and absorbs the voltage spikes on the main switch voltage. The series configuration with a voltage doubler at the second side contributes to a high-voltage gain and reduces the voltage stress across the rectifier devices. The output diode reverse-recovery problem is naturally mitigated by the leakage inductance of the coupled inductors. Moreover‚ the active control with a neutral-point potential
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admission to higher and professional studies was essentially based on the performance in the entrance examinations conducted annually by various High Schools. The gradual degeneration of the conventional examination system manifested in frequent leakage of question papers‚ manipulation of marks‚ copying and use of unfair means by all involved. Entrance examinations have been devised by some reputed institutions to screen the large set of students coming from vastly different backgrounds for admission
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A.Problem Can eggshell with styrofoam be a substitute to commercial sealant? B.Title Eggshell with Styrofoam and Gasoline Used as a Substitute to Commercial Sealant C.Abstract The researchers thought of using eggshell‚ styrofoam and gasoline as a sealant. To make the sealant‚ the researchers put the styrofoam in the gasoline and melted it by stirring the gasoline. After stirring‚ the pounded eggshell was mixed. The researchers conducted four experiments. The commercialized sealant and
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