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Title: Slide Presentations for ECE 329, Introduction to Electromagnetic Fields, to supplement


1
Slide Presentations for ECE 329,Introduction to
Electromagnetic Fields,to supplement Elements
of Engineering Electromagnetics, Sixth Edition
  • by
  • Nannapaneni Narayana Rao
  • Edward C. Jordan Professor of Electrical and
    Computer Engineering
  • University of Illinois at Urbana-Champaign,
    Urbana, Illinois, USA
  • Distinguished Amrita Professor of Engineering
  • Amrita Vishwa Vidyapeetham, Coimbatore, Tamil
    Nadu, India

2
  • 4.1
  • Conductors
  • and Semiconductors

3
  • Material Media can be classified as
  • (1) Conductors
  • and Semiconductors
  • (2) Dielectrics
  • (3) Magnetic materials magnetic property
  • Conductors and Semiconductors
  • Conductors are based upon the property of
    conduction, the phenomenon of drift of free
    electrons in the material with an average drift
    velocity proportional to the applied electric
    field.

electric property
4
In semiconductors, conduction occurs not only by
electrons but also by holes vacancies created
by detachment of electrons due to breaking of
covalent bonds with other atoms. The conduction
current density is given by
Ohms Law at a point
5
conductors semiconductors
6
Ohms Law
Ohms Law
7
  • D4.1
  • (a) For cu,
  • (b)

8
  • (c) From

9
  • Conductor in a static electric field

10
rS e0E0
rS e0E0
rS e0E0
rS e0E0
rS e0E0
rS e0E0
11
  • P4.3
  • (a)

12
  • (b)

Write two more equations and solve for the four
unknowns.
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