Faculty of Engineering Handbook

CIRCUIT THEORY

Subject Code:	ECT1016
Objective:	To provide a basic understanding of the laws of circuit theory and the behavior of circuits during steady-state and transient conditions.
Pre-Requisite:	None
Credit Hours:	3
Contact Hours:	53 hours (lectures, tutorials & laboratory experiments)
Assessment:	Lab Experiments: 10% Test/Quiz: 15% Tutorial/Assignment: 15% Final Examination: 60%
Laboratory:	1. Thevenin's Theorem and Superposition Theorem 2. AC Circuits
References:	C.K. Alexander and M.N.O. Sadiku, “Fundamentals of Electric Circuits”, 2nd ed., McGraw-Hill, 2003 J. Nilsson and S. Riedel, “Electric Circuits”, 7th ed., Prentice-Hall, 2005 R. C. Dorf and J. A. Svoboda, “Introduction to Electric Circuits”, 6th ed., John Wiley, 2004 W. H. Hayt, Jr, J. E. Kemmerly and S. M. Durbin, “Engineering Circuit Analysis”, 6th ed., McGraw-Hill, 2002 Robert L. Boylestad, "Introductory Circuit Analyis", 10th ed, Prentice Hall, 2003

Course Contents

Circuit Elements and Basis Laws
Electric quantities: charges, voltage, current, power, energy. Voltage and current sources, resistor, inductor and capacitor. Ohm’s Law. Kirchoff’s current and voltage laws. Thevenin and Norton equivalents, superposition, reciprocity, maximum power transfer theorem.
Signal and Waveforms
Signal waveforms: d.c. step, impulse, square pulse, sinusoidal, triangular, exponential. General description of signals: time constant, rms value, duty cycle, crest factor, form factor.
Sinusoidal Steady State Analysis
Effective alternating current. a.c. behavior in R, L and C elements. Phasor analysis with complex algebra, Two terminal networks - impedance, admittance and their real and imaginary parts. Resonance: series and parallel resonance, half power points, bandwidth, Q-factors. Power: instantaneous, average, power factor, active, reactive, complex, apparent.
Transient Analysis
Analysis of first order LR and RC circuits subjected to excitation of d.c., square pulse, sinusoidal sources and exponential sources. Interpretation of complementary function and particular integral. Analysis of second order RLC circuit subjected to step input and sinusoidal input.
Network Analysis
Elementary network topology, network constraints, network equilibrium equations. Nodal and mesh network analysis.

Learning Outcome of Subject

At the completion of the subject, students should be able to:

State the basic concepts and laws of electric circuit.

Define different types of signal.

Calculate measures of signals such as time constant and rms value.

Analyse the sinusoidal steady state response of the circuits.

Perform calculations of impedance, resonance and complex power.

Compute the transient response for RL, RC and RLC circuits.

Solve the electrical networks using nodal and mesh analysis techniques.

Programme Outcomes (% of contribution)

Ability to acquire and apply fundamental principles of in relevant fields of science, engineering, and digital arts - 60%

Capability to communicate effectively - 10%

Acquisition of technical competence in specialized areas of engineering discipline - 10%

Ability to identify, formulate and model problems and find engineering solutions based on a systems approach - 10%

Ability to work effectively as an individual, and as a member/leader in a team -5%

Capability and enthusiasm for self-improvement through continuous professional development and life-long learning. - 5%