1. EEE 121: ELECTRIC CIRCUIT ANALYSIS - I
Ahsan Khawaja
ahsan_khawaja@comsats.edu.pk
Department of Electrical Engineering,
COMSATS Institute of Information Technology, Islamabad

2. 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

3. • 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

4. High level lecture breakdown
Circuit 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.

5. 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)

6. Overview of electric power
3 main issues pertaining to
electric power…
• Generation
• Transmission
• Distribution

7. 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.

8. 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.

9. 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

10. 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.

11. From DC to AC

12. A.C generation - Coal

13. A.C generation - Hydal

14. A.C generation - Nucleur

15. Transmission
• Power generated in a power station (hundreds of MWatts) is
transported over a long distances (hundreds of kilometers) with
transmission lines and towers.

16. Transmission plus distribution