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802307 Electrical Engineering for Civil Engineers

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## 802307 Electrical Engineering for Civil Engineers

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**802307Electrical Engineeringfor Civil Engineers**Electrical Engineering department Umm Al-Qura University Dr. Basim J. Zafar**This Course …**• Applications of Electrical Engineeringin Different Systems.. • Concepts and Basics of Electricity and Electronics.. • Practical Engineering Applications..**Course Content**• History of Electricity • Basic Concepts • electrons, battery, DC&AC, frequency, closed loop, current, RMS • Components • R, C, L, fuses, breakers, relays, solenoids, diodes, transistors, ICs**Course Content**• Circuit Analysis • ohms law, dividers, KCL, KVL, complex impedance, current source, power • Application Specific Circuits • Power Generation and Distribution • DC machines, transformers, 3-phase systems**Course Content**• Sensors & Actuators • resistive, capacitive, inductive • special sensors • data acquisition**Class Format**• Active Class • Teams of 2 students • Weekly Quiz (no makeup's) • Weekly Activities • In-Class Readings**Rules**• Quizzes • grades 0 or 10 • be ON-TIME • absence = -2 • no material on table • calculator & pencil • 2 decimal points with proper units • cheating = BIG TROUBLE**Rules**• Activities • team ID + members IDs • nice fonts and presentation • members loads must be equal • Teamwork • any conflict should be stated from the beginning**Grades**• Quizzes 10% • Home Works/ Class Activities 10% • Mid Term Exams I 15% • Mid Term Exams II 15% • Final 50%**Students ID’s**• EE307 Sections • IDs in Teams: • Team A: A1 – A4. • Team B: B1 – B4. • Team C: C1 – C4. • Team D: D1 – D4. • Team E: E1 – E4.**http://uqu.edu.sa/bjzafarE-mailBJZafar@uqu.edu.sa**Class homepage**Introduction**Section 01**History of Electricity**• Ancient Egyptian 2750 BC • shocks from electric fish**History of Electricity**• Romans 1500 BC • shocks can travel in metals • Thales 600 BC • Noticed static electricity from polishing amber with a piece of wool or fur. • Arabs 1400 • Identity of lightening • William Gilbert 1600 • Coined the New Latin word electricus to refer to the property of attracting small objects after being rubbed**History of Electricity**• Benjamin Franklin 1753 • lightening key experiment • Luigi Galvani 1771-1791 • nerve cells passed signals to the muscles • Alessandro Volta 1800 • invented the voltaic pile consist of Zinc and silver. • Hans Christian Ørsted 1819 • demonstrates electromagnetism. Current flowing in a wire creates a magnetic field which deflects a compass needle.**History of Electricity**• André-Marie Ampère 1820 • Figures out a way to measure the strength of a magneticfield in relation to an electriccurrent, known as Ampere’stheorem. • Michael Faraday 1831 • learned how to produce continuous voltage. |This was the first electric motor (generator). • Georg Ohm 1827 • mathematically analyzed the electrical circuit (ohm's law) • Tesla, Edison, Westinghouse, Siemens, 1900’s Graham Bell and Kelvin • Electricity was turned from a scientific curiosity into an essential tool for modern life (Second Industrial Revolution)**ExoMars Mission**Life in other planets!**ExoMars Mission**• landing of a large payload on Mars • navigation and operation of a mobile scientific platform • a novel drill to obtain subsurface samples • sample processing and distribution system • protection and cleanliness levels**Process Check, Home Work**• Ask yourself.. • What do I need to know about EE? • Make presentation about one of the experiment**Basic Concepts**Section 02**Electrons**• Atoms and Electrons**Electricity**• If electrons were pushed, they produce a current**Battery**• Source of pushing electrons • Electrochemical reactions • Look for types of batteries in Wikipedia!! Home Work**Volt**• Alexander Volta (first battery) • Electromotive Force • 1.5V, 110V, 13.8kV**Current**• Number of electrons passing every second • Ampere (A) is a unit of current • 1 A = 6.28 x 1018 electrons/sec • At home: 60A,100A • Electronics: 10mA**AC and DC Currents**• DC: direct current • AC: alternating current volt volt time time**Frequency of AC Signal**volt volt time time • Frequency = Number of cycles per second**Experiment!!**• What’s the highest frequency your eyes can notice? • frequency vs. amplitude.. • 790–400 terahertz – light**Closed Loop Circuits**• No current will flow in an open loop circuit..**Closed Loop Circuits**• Electric Circuit is a pipeline that facilitates the transfer of charge from one point to another**Power**• Power is the time rate of change of energy • Unit: watts (W) • P=VI**Elements supplying Energy vs. Elements absorbing Energy**• An element in the electric circuit is absorbing energy if +ve current enters the +ve terminal • An element in the electric circuit is supplying energy if +ve current enters the -veterminal**Ground Currents**• Why birds do not get shocked by high voltage lines? • How do you charge a weak car battery?**Activity**• Determine the amount of power absorbed or supplied by the elements in the figure? I = 2 A V1= 4 V 4 V**Activity**• Determine the amount of power absorbed or supplied by the elements in the figure? V1= 12 V 12 V I = 4 A**AC Source**• Generally produces sine wave**RMS**• RMS: Root Mean Square • power is measured instead of peak voltage • for sine or cosine signals, v(t) = A cos(2pt/T)**RMS**• If your meter reads 10V~ • then vpeak = 10*1.4 = 14V • If your peak voltage is 154Vp • then the meter reads RMS = 154*0.7 = 110V~**More Readings**Basic Engineering Circuit Analysis By J. D. Irwin and R. M. Nelms John Wiley & Sons, 2005 or newer edition