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DIELECTRIC MATERIALS

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LECTURE # 16 DIELECTRIC MATERIALS OBJECTIVES To explain in your own words what is meant by polarization. To distinguish between relative permittivity and the ... – PowerPoint PPT presentation

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Title: DIELECTRIC MATERIALS


1
LECTURE 16
  • DIELECTRIC MATERIALS

2
OBJECTIVES
  • To explain in your own words what is meant by
    polarization.
  • To distinguish between relative permittivity and
    the permittivity of free space.
  • To solve electrostatic problems involving
    dielectric materials.

3
DIELECTRIC MATERIAL UNDER STATIC CONDITIONS
  • APPROACH
  • Microscopic point of view
  • Macroscopic point of view

E applied
Dielectric material
4
MICROSCOPIC POINT OF VIEW
Classical model of an atom
Assume E applied 0
ve
nucleus
- ve
Orbit
5
AN ATOM UNDER STATIC CONDITION
Total charge q
Total charge -q
E applied
6
MICROSCOPIC DIPOLE MOMENT
q
-q
7
MACROSCOPIC POINT OF VIEW
Assume dielectric material is polar material
H20 molecule

- ve

E applied 0
E applied ? 0
8
GROUP OF ATOMS
Assume number of atoms is 10
Electric polarization vector
0
of atoms
Electric dipole moment
E applied 0
9
E applied ? 0
? 0
Polarized dielectric material.
10
REVIEW
Polarization vector
E applied ? 0
11
THANK YOU
  • QUESTIONS AND ANSWERS
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