Seat No.: _____ Enrolment No.______ GUJARAT TECHNOLOGICAL UNIVERSITY B.E. Sem- 1st Regular Examination January 2011 Subject code: 110005 Subject Name: Elements of Electrical Engineering Date: 07/ 01 /2011 Time: 10.30 am - 01.00 pm Total Marks: 70 Instructions: 1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. Q.1 Three resistances Rab‚ Rbc and Rca are connected in star. Obtain their equivalent for delta resistances
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Yagi-Uda Antenna Let the driven element be kept at the origin and one parasitic element at z=-.125 . Let both dipoles are oriented along x axis. Due to the driven element (1)‚ the current will be induced in (2) and this element is called parasitic element. The current induced in the second element depends on its length‚ radius of the element and spacing. Let the current in driven element and parasitic element be 1 A and 1 2 0.7Ð1400 A‚ respectively. AF = I1e jb d 1 cos q + I 2 e
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INSTRUCTOR SOLUTIONS MANUAL SEARS & ZEMANSKY’S COLLEGE PHYSICS 9TH EDITION HUGH D. YOUNG Forrest Newman Sacramento City College Boston Columbus Indianapolis New York San Francisco Upper Saddle River Amsterdam Cape Town Dubai London Madrid Milan Munich Paris Montreal Toronto Delhi Mexico City São Paulo Sydney Hong Kong Seoul Singapore Taipei Tokyo Executive Editor: Senior Project Editor: Editorial Manager: Managing Editor: Production Project Manager: Production Management and
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The Five Competitive Forces Model In this section‚ the structure of our company will be explained using the five competitive forces model developed by Harvard professor Michael Porter. These forces include: rivalry among existing firms‚ threat of new entrants‚ bargaining power of buyers‚ threat of substitutes and bargaining power of suppliers. Each of these forces will have their own distinctive effect on determining industry profitability. Intensity of rivalry among competitors: Recently there
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Series and Parallel Circuits Name: Angelica Castro Directions: 1. Go to the following website: http://phet.colorado.edu/en/simulation/circuit-construction-kit-ac-virtual-lab 2. Click “Run now.” You now have the raw material to create a circuit. Take a moment to look over the site and find all the different materials. To build a circuit you will need several wires‚ a light bulb‚ a voltage source‚ a voltmeter‚ and a non – contact ammeter. Play with it to see how to grab and manipulate
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Week #7 Chapter 10 Static and Current Electricity Exercises (p.221) 6. Strictly speaking‚ will a penny be slightly more massive if it has a negative charge or a positive charge? Explain. A negative charge because when it is negatively charged electrons are added to the penny. 17. What is the voltage at the location of a 0.0001 C charge that has an electric potential energy of 0.5 J (both voltage and potential relative to the same reference point)? Potential = energy Charge = 0.5 J / 0.0001
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CHAPTER 2 CAPACITOR & DIELECTRIC Subtopics 2.1 2.2 2.3 2.4 Capacitance‚ Capacitor in series & parallel Charging & discharging of capacitors Capacitors with dielectric Energy stored in a charged capacitor 2.1 Capacitance‚ Capacitor in series & parallel Learning Outcomes: At the end of this topic‚ students should be able to: Define capacitance Use the capacitance formula Determine capacitance of parallel plate Deduce & calculate the effective capacitance of capacitors in series & parallel
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A.C. P7 Describe the properties and an application of two different magnetic materials commonly used in electrical and electronic engineering Task 1 By research and investigation; a) Identify and name two magnetic materials used in electrical engineering b) Give an application of each of the two materials c) Define two of the magnetic properties terms listed below: B-H curve*‚ retentivity (a.k.a. remanence)‚ coercivity (a.k.a. coercive force)‚ hysteresis‚ absolute permeability*‚ relative
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A. According to analysis of the five forces of the Singing Valley market‚ we list some assumptions for their business: 1. Bargaining power of customers: Since the Singing Valley’s auto email system had a negative influence in the market. Customers will be able to get a cheaper budget since the company has to make up the “hurt” which they did to client. 2. Threat of substitutions: Customer who had complained to Singing Valley can choose other places for vocation‚ like Yosemite‚ Hawaii‚ etc. 3
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ON THE ELECTRODYNAMICS OF MOVING BODIES By A. EINSTEIN June 30‚ 1905 It is known that Maxwell’s electrodynamics—as usually understood at the present time—when applied to moving bodies‚ leads to asymmetries which do not appear to be inherent in the phenomena. Take‚ for example‚ the reciprocal electrodynamic action of a magnet and a conductor. The observable phenomenon here depends only on the relative motion of the conductor and the magnet‚ whereas the customary view draws a sharp distinction
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