ECT1026

Field Theory


Subject Code:	ECT1026
Objective:	To provide a basic understanding of the basic laws of electrostatic and magnetostatic fields in the engineering context.
Pre-Requisite:	None
Credit Hours:	3
Contact Hours:	45 hours (lectures and tutorials)
References:	S. V. Marshall, R. E. DuBroff, G. G. Skitek, "Electromagnetic Concepts and Applications", Prentice Hall, 1996. K. R. Demarest, "Engineering Electromagnetic", Prentice Hall, 1998. Fawwaz T. Ulaby, "Fundamentals of Applied Electromagnetic", Prentice Hall, 1997. J. D. Kraus, D. A. Fleisch, "Electromagnetic with Applications", Mc Graw Hill, 1999.

Scalar and Vector Fields
Overview of vector algebra: addition, subtraction, scalar product and vector product. Cartesian coordinate system, cylindrical coordinate system, spherical coordinate system, conversions between coordinate systems. Integrals of scalar and vector fields.
Electrostatics
Charge and charge density. Coulomb’s Law. Concept of fields. Electric flux density and electric field intensity. Gauss’s Theorem and applications. Voltage and electric potential. Conductor, dielectrics. Polarization, susceptibility, permittivity. Electrostatic boundary condition. Capacitance calculation and electric energy.
Magnetostatics
Current and current density. Magnetic dipoles and current loops. Magnetic flux density and magnetic field intensity. Biot-Savart Law and Ampere Law, Faraday Law. Magnetostatic boundary condition. Self and mutual induction. Inductance calculation and magnetic energy.
Magnetic Circuits
B and H, Magnetic materials: diamagnetic material, paramagnetic material, ferromagnetic material. Saturation and hysterisis, Hysterisis loss and eddy current loss, reluctance and permeance, Analysis of linear magnetic circuits (with air-gap problems).