ekt 241 4 electromagnetic theory n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
EKT 241/4: ELECTROMAGNETIC THEORY PowerPoint Presentation
Download Presentation
EKT 241/4: ELECTROMAGNETIC THEORY

Loading in 2 Seconds...

play fullscreen
1 / 31

EKT 241/4: ELECTROMAGNETIC THEORY - PowerPoint PPT Presentation


  • 218 Views
  • Uploaded on

EKT 241/4: ELECTROMAGNETIC THEORY. UNIVERSITI MALAYSIA PERLIS. PREPARED BY: NORDIANA MOHAMAD SAAID dianams@unimap.edu.my. CHAPTER 1 - INTRODUCTION. Electromagnetic Applications. Optical transmission Coaxial transmission line Antenna system High voltage transmission.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'EKT 241/4: ELECTROMAGNETIC THEORY' - bradley-barrera


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
ekt 241 4 electromagnetic theory

EKT 241/4:ELECTROMAGNETIC THEORY

UNIVERSITI MALAYSIA PERLIS

PREPARED BY: NORDIANA MOHAMAD SAAID

dianams@unimap.edu.my

CHAPTER 1 - INTRODUCTION

electromagnetic applications
Electromagnetic Applications
  • Optical transmission
  • Coaxial transmission line
  • Antenna system
  • High voltage transmission

UNIVERSITI MALAYSIA PERLIS

electrostatic vs magnetostatic
Electrostatic vs. Magnetostatic

UNIVERSITI MALAYSIA PERLIS

timeline for electromagnetics in the classical era
Timeline for Electromagneticsin the Classical Era
  • 1785 Charles-Augustin de Coulomb (French) demonstrates that the electrical force between charges is proportional to the inverse of the square of the distance between them.

UNIVERSITI MALAYSIA PERLIS

timeline for electromagnetics in the classical era1
Timeline for Electromagneticsin the Classical Era
  • 1835 Carl Friedrich Gauss (German) formulates Gauss’s law relating the electric flux flowing through an enclosed surface to the enclosed electric charge.

UNIVERSITI MALAYSIA PERLIS

timeline for electromagnetics in the classical era2
Timeline for Electromagneticsin the Classical Era
  • 1873 James Clerk Maxwell (Scottish) publishes his “Treatise on Electricity and Magnetism” in which he unites the discoveries of Coulomb, Oersted, Ampere, Faraday and others into four elegantly constructed mathematical equations, now known as Maxwell’s Equations.

UNIVERSITI MALAYSIA PERLIS

units and dimensions
Units and Dimensions
  • SI Units
  • French name ‘Systeme Internationale’
  • Based on six fundamental dimensions

UNIVERSITI MALAYSIA PERLIS

multiple sub multiple prefixes
Multiple & Sub-Multiple Prefixes

Example:

  • 4 x 10-12 F becomes

4 pF

UNIVERSITI MALAYSIA PERLIS

the nature of electromagnetism
The Nature of Electromagnetism

Physical universe is governed by 4 forces:

  • nuclear force
  • weak-interaction force
  • electromagnetic force
  • gravitational force

UNIVERSITI MALAYSIA PERLIS

the electromagnetic force analogy the gravitational force
The Electromagnetic ForceAnalogy: The Gravitational Force

Where;

m2, m1 = masses R12= distanceG = gravitational constant

= unit vector from 1 to 2

Gravitational force

UNIVERSITI MALAYSIA PERLIS

the electric fields
The Electric Fields

Coulomb’s law

UNIVERSITI MALAYSIA PERLIS

Where;

Fe21 = electrical force

q1,q2 = charges

R12 = distance between the two charges = unit vector

ε0 = electrical permittivity of free space

the electric fields1

where = radial unit vector

pointing away from charge

The Electric Fields

Electric field intensity, E

due to q

UNIVERSITI MALAYSIA PERLIS

the electric fields2
The Electric Fields

TWO important properties for electric charge:

  • Law of conservation of electric charge

2. Principle of linear superposition

UNIVERSITI MALAYSIA PERLIS

the electric fields3
The Electric Fields

Electric flux density, D

UNIVERSITI MALAYSIA PERLIS

where E = electric field intensityε = electric permittivity of the material

the magnetic fields
The Magnetic Fields
  • Velocity of light in free space, c

where µ0 = magnetic permeability of free space

= 4π x 10-7 H/m

  • Magnetic flux density, B

where H = magnetic field intensity

UNIVERSITI MALAYSIA PERLIS

permittivity
Permittivity
  • Describes how an electric field affects and is affected by a dielectric medium
  • Ability of material to polarize in response to field
  • Reduce the total electric field inside the material
  • Permittivity of free space;
  • Relative permittivity

UNIVERSITI MALAYSIA PERLIS

permeability
Permeability
  • The degree of magnetization of a material
  • Responds linearly to an applied magnetic field.
  • The constant value μ0 is known as the magnetic constant, i.e permeability of free space;
  • Relative permeability

UNIVERSITI MALAYSIA PERLIS

the electromagnetic spectrum
The Electromagnetic Spectrum

UNIVERSITI MALAYSIA PERLIS

review of complex numbers
Review of Complex Numbers
  • A complex number z is written in the rectangular form Z = x ± jy
  • x is the real ( Re ) part of Z
  • y is the imaginary ( Im ) part of Z
  • Value ofj = −1 .
  • Hence, x =Re (z) , y =Im (z)

UNIVERSITI MALAYSIA PERLIS

forms of complex numbers
Forms of Complex Numbers
  • Using Trigonometry, convert from rectangular to polar form,
  • Alternative polar form,

UNIVERSITI MALAYSIA PERLIS

forms of complex numbers1
Forms of complex numbers
  • Relations between rectangular and polar representations of complex numbers.

UNIVERSITI MALAYSIA PERLIS

forms of complex numbers2
Forms of complex numbers

UNIVERSITI MALAYSIA PERLIS

complex conjugate
Complex conjugate
  • Complex conjugate, z*
  • Opposite sign (+ or -) & with * superscript (asterisk)
  • Product of complex number z with its complex conjugate is always a real number;

UNIVERSITI MALAYSIA PERLIS

equality
Equality
  • z1 = z2 if and only if x1=x2 AND y1=y2
  • Or equivalently,

UNIVERSITI MALAYSIA PERLIS

addition subtraction
Addition & Subtraction

UNIVERSITI MALAYSIA PERLIS

multiplication in rectangular form
Multiplication in Rectangular Form
  • Given two complex numbers z1 and z2;
  • Multiplication gives;

UNIVERSITI MALAYSIA PERLIS

multiplication in polar form
Multiplication in Polar Form
  • In polar form,

UNIVERSITI MALAYSIA PERLIS

division in polar form
Division in Polar Form
  • For

UNIVERSITI MALAYSIA PERLIS

division in rectangular form
Division in Rectangular Form

UNIVERSITI MALAYSIA PERLIS

powers
Powers
  • For any positive integer n,
  • And,

UNIVERSITI MALAYSIA PERLIS

powers1
Powers
  • Useful relations

UNIVERSITI MALAYSIA PERLIS