Understanding Engineering Electromagnetics: Fields, Applications, and Vector Analysis - Pr, Slides of Electromagnetism and Electromagnetic Fields Theory

An introduction to engineering electromagnetics, a fundamental course in the study of electric and magnetic fields. The course covers the production of electric and magnetic fields, their applications in various disciplines, and the principles of vector analysis. Topics include the electromagnetic wave spectrum, scalar and vector quantities, vector algebra, and the rectangular coordinate system. The document also includes examples and exercises to help students understand the concepts.

Typology: Slides

2022/2023

Uploaded on 03/05/2024

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President University Erwin Sitompul EEM 1/1
Electric field
Produced by the presence of
electrically charged particles,
and gives rise to the electric
force.
Magnetic field
Produced by the motion of
electric charges, or electric
current, and gives rise to the
magnetic force associated
with magnets.
Engineering Electromagnetics
What is Electromagnetics?
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Electric field

Produced by the presence of electrically charged particles, and gives rise to the electric force.

Magnetic field

Produced by the motion of electric charges, or electric current, and gives rise to the magnetic force associated with magnets. Engineering Electromagnetics

What is Electromagnetics?

Engineering Electromagnetics

Electromagnetic Wave Spectrum

Engineering Electromagnetics

 Electromagnetic principles find application in various disciplines

such as microwaves, x-rays, antennas, electric machines,

plasmas, etc.

Applications

Engineering Electromagnetics

 Electromagnetic fields are used in induction heaters for melting,

forging, annealing, surface hardening, and soldering operation.

 Electromagnetic devices include transformers, radio, television,

mobile phones, radars, lasers, etc.

Applications

Chapter 1 Vector Analysis

 Scalar refers to a quantity whose value may be represented by

a single (positive or negative) real number.

 Some examples include distance, temperature, mass, density,

pressure, volume, and time.

 A vector quantity has both a magnitude and a direction in

space. We especially concerned with two- and three-

dimensional spaces only.

 Displacement, velocity, acceleration, and force are examples of

vectors.

  • (^) Scalar notation: A or A ( italic or plain)
  • (^) Vector notation: A or A ( bold or plain with arrow)

Scalars and Vectors

Chapter 1 Vector Analysis ABBA A  ( B + C ) ( AB + C ) ABA   ( B ) 1 n n

A

A

A  B  0  A  B

Vector Algebra

Chapter 1 Vector Analysis

Vector Components and Unit Vectors

rxyz x y z rx ay az a , , : x y z a a a unit vectors

PQ

R

PQ Q P Rrr  (2 a (^) x  2 a (^) ya (^) z )  (1 a (^) x  2 a (^) y  3 a (^) z ) 4 2 x y zaaa

 For any vector B , :

Chapter 1 Vector Analysis

Vector Components and Unit Vectors

x x y y z z BB aB a + B a 2 2 2 x y z BBBBB Magnitude of^ B 2 2 2 B B x B (^) y Bz

B

a (^) 

B

B

Unit vector in the direction of B

 Example

Given points M (–1,2,1) and N (3,–3,0), find R

MN

and a

MN

MN x y z x y z Raaa   aaa 4 5 x y zaaa MN MN MN

R

a R^2 2

x ^ yz      a a a 0.617 0.772 0. x y zaaa