Download - Electric Circuit - Introduction + Lecture#1
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EEE 121: ELECTRIC CIRCUIT ANALYSIS - I
Ahsan [email protected]
Department of Electrical Engineering,COMSATS Institute of Information Technology, Islamabad
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Marks Distribution(Theory – 3 credits = 75%)
Department of Electrical Engineering,COMSATS Institute of Information Technology, Islamabad
Sessional-I = 10 Assignments = 10
Sessional-II = 15 Terminal Exam = 50
Quizzes = 15 Total Marks = 100
Lab work incl. pre-lab = 25 Attendance = 10
Lab reports, assignments = 25 Terminal exam and viva voce = 40
Total Marks = 100
(Laboratory – 1 credit = 25%)
EEE 121: ELECTRIC CIRCUIT ANALYSIS - I
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• Textbook:– Electric Circuits, James W. Nilsson and Susan A. Riedel, 8th edition.– Fundamentals of Electric Circuits, Charles K. Alexander and Mathew
Sadiku, 2nd edition.
• Reference Texts:– Basic Engineering Circuit Analysis, David J. Irwin, 7th edition.
Department of Electrical Engineering,COMSATS Institute of Information Technology, Islamabad
EEE 121: ELECTRIC CIRCUIT ANALYSIS - I
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High level lecture breakdownCircuit Variables and Circuit Elements: Voltage, Current, resistors, Power and Energy, Passive sign conventions, Voltage/Current sources, Ohm’s Law, Kirchhoff’s Law, Dependent sources. Cramers’ rule
Resistive Circuits: Series/Parallel combinations, Voltage/Current divider circuits, The Wheatstone Bridge, Delta-to-Wye conversion. Techniques of Circuit Analysis: Node-voltage method with/without dependent sources (and special cases), Mesh-current methods with/without dependent sources (and special cases), Source transformations, Superposition, Thevenin/Nortorns Equivalents, Maximum power theorem.
Inductance, capacitance and Mutual Inductance: Inductance, series/parallel combinations of inductors, Capacitance, series parallel combinations of capacitance, Mutual inductance
First Order RL and RC Circuits: Natural response of RL/RC circuits, Step response of RL/RC circuits. Sequential Switching and Unbounded response.
Second Order RLC Circuits: Natural and Step responses of a parallel and series RLC circuit.
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List of Experiment
Department of Electrical Engineering,COMSATS Institute of Information Technology, Islamabad
EEE 121: ELECTRIC CIRCUIT ANALYSIS - I
Lab # Lab Title
1. Introduction to Lab Instruments
2. Identifying Resistor Color-Codes and Verifying Ohm's Law
3. Resistor Combinations - Series And Parallel
4. Kirchhoff’s Laws and Voltage/Current-Division
5. Voltmeter Design Using Galvanometer
6. Ammeter Design Using Galvanometer
7. Determining Internal Resistance of a Voltage Source
8. Node-Voltage Method
9. Mesh-Current Method
10. Superposition Theorem
11. Thevenin's Theorem
12. Norton's Theorem
13. Maximum Power Transfer Theorem
14. Natural Response of an RC Circuit
15. Lt. Spice (software)
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Overview of electric power
3 main issues pertaining to electric power…• Generation
• Transmission
• Distribution
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Electric Power Uses
• Lighting, heating, cooling and other domestic electrical appliances used in home/office.
• Irrigating vast agricultural lands using Tube wells.
• Running motors, furnaces of various kinds, in industries.
• Amount of national electrical power consumption used as an indicator of economic prosperity.
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Power generation P = (V x I)Watts
• Early 18th century, electrical power generated and stored in the form of DC batteries.
• Limitations– Low current/voltage achieved.– Not feasible to transmit power over long
distances.– Area specific generation and distribution resulted
in cost prohibitive deployment.
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From DC to AC
• Faraday’s Laws of electromagnetic Induction
A diagram of Faraday's iron ring apparatus. Change in the magnetic flux of the left coil induces a current in the right coil
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From DC to AC
• A power system with 3-phase, 50 Hz A.C generation, transmission and distribution networks. – transmission of large power (MW) at higher transmission
voltage.– Level of voltage could be changed virtually to any other
desired level with transformers which is impossible in DC systems
• Nicola Tesla suggested simpler electrical motors (induction motors)
• Tesla’s arguments resulted in mass switchover from D.C to A.C systems.
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From DC to AC
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A.C generation - Coal
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A.C generation - Hydal
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A.C generation - Nucleur
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Transmission
• Power generated in a power station (hundreds of MWatts) is transported over a long distances (hundreds of kilometers) with transmission lines and towers.
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Transmission plus distribution