Introduction To Engineering Electromagnetics
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Introduction to Engineering Electromagnetics
Author: Yeon Ho Lee
language: en
Publisher: Springer Science & Business Media
Release Date: 2013-03-26
This text provides students with the missing link that can help them master the basic principles of electromagnetics. The concept of vector fields is introduced by starting with clear definitions of position, distance, and base vectors. The symmetries of typical configurations are discussed in detail, including cylindrical, spherical, translational, and two-fold rotational symmetries. To avoid serious confusion between symbols with two indices, the text adopts a new notation: a letter with subscript 1-2 for the work done in moving a unit charge from point 2 to point 1, in which the subscript 1-2 mimics the difference in potentials, while the hyphen implies a sense of backward direction, from 2 to 1. This text includes 300 figures in which real data are drawn to scale. Many figures provide a three-dimensional view. Each subsection includes a number of examples that are solved by examining rigorous approaches in steps. Each subsection ends with straightforward exercises and answers through which students can check if they correctly understood the concepts. A total 350 examples and exercises are provided. At the end of each section, review questions are inserted to point out key concepts and relations discussed in the section. They are given with hints referring to the related equations and figures. The book contains a total of 280 end-of-chapter problems.
Engineering Electromagnetics
Author: Nathan Ida
language: en
Publisher: Springer Science & Business Media
Release Date: 2013-03-14
The applications involving electromagnetic fields are so pervasive that it is difficult to estimate their contribution to the industrial output: generation of electricity, power transmission lines, electric motors, actuators, relays, radio, TV and microwave transmission and reception, magnetic storage, and even the mundane little magnet used to hold a paper note on the refrigerator are all electromagnetic in nature. One would be hard pressed to find a device that works without relaying on any electromagnetic principle or effect. This text provides a good theoretical understanding of the electromagnetic field equations but also treats a large number of applications. In fact, no topic is presented unless it is directly applicable to engineering design or unless it is needed for the understanding of another topic. In electrostatics, for example, the text includes discussions of photocopying, ink-jet printing, electrostatic separation and deposition, sandpaper production, paint spraying, and powder coating. In magnetics, the applications discussed include electric motors, implantable magnets, nuclear magnetic resonance, magnetic stirring of molten materials, and electromagnetic braking and bearings. Electric motors and transformers are used to demonstrate the ideas of magnetic forces and torques and of induction; the applications discussed include the new super-efficient electric drives, linear induction motors, and implantable transformers to power life-sustaining devices. The discussion of wave-propagation phenomena will include applications of new materials to aerospace systems, such as the so-called stealth materials, as well as the use of electromagnetic weaves for materials processing, such as grain drying with microwaves, microwave detection of explosives, and remote sensing of the earth and its resources.
Introduction to Engineering Electromagnetics
This book provides junior and sophomore college and university students with a thorough understanding of electromagnetic fundamentals through rigorous mathematical procedures and logical reasoning. Electromagnetics is one of the most difficult courses in engineering, because mathematical theorems cannot completely convey the physical concepts underlying electromagnetic principles. This book fills this gap with logical reasoning, such as symmetry considerations and the uniqueness theorem, and clearly distinguishes between mathematical procedures and expressions for physical events. The sign convention is carefully set to distinguish static, phasor, and time-varying quantities, and to be consistent with double-indexed symbols. This book begins with a coverage of vector fields, coordinate systems, and vector calculus, which are customized for the study of electromagnetics. Subsequently, static electric and magnetic fields are discussed. Before discussing time-varying fields and their applications in transmission lines, waveguides, and antennas, the concept of wave motion is explained. Most of the 379 figures are drawn in three dimensions, and the measured data are drawn to scale. A total of 184 examples show rigorous approaches to solving practical problems using the aforementioned concepts, and 301 exercises with answers provide a means of checking whether students correctly understood the concepts. The sections end with 445 review questions, with hints referring to the related equations and figures. This book contains 507 end-of-chapter problems.