lec2 - 4 Properties of E-field • Electric field is...

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Lecture Notes for C-term 2009 Lecture 2 Prof. R. Ludwig Department of Electrical and Computer Engineering Worcester Polytechnic Institute Worcester, MA ECE 2112 Electromagnetic Theory Copyright, 2000 © R. Ludwig
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ECE2112 copyrights reserved 2 Lecture 2 Objectives • What are the causes that establish electric and magnetic fields? • How does media affect the electric and magnetic fields? • How are the field effects classified?
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ECE2112 copyrights reserved 3 ECE 2112 - Lecture 2 Electric field concept – normalized force law (Coulomb’s law) – Electric field definition – effect polarization – material influence is taken into account through displacement field (and dielectric constant) 2 0 1 4 R q R  u E E D r 0 -2 -1 0 1 2 -2 -1 0 1 2
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ECE2112 copyrights reserved
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Unformatted text preview: 4 Properties of E-field • Electric field is recorded in V/m (in static situations can be linked to a potential) • Electric field can polarize dielectric media (capacitors) ECE2112 copyrights reserved 5 ECE 2112- Lecture 2 • Magnetic Field Concept • Biot-Savart Law (theory) • effect magnetization • material influence is taken into account through flux density (and permeability) H B r u H r I 2 ECE2112 copyrights reserved 6 ECE 2112- Lecture 2 Classification of E&M Static (dq/dt=0) Steady current (dI/dt=0) Dynamic dq/dt, dI/dt Field Organization E and H Electrostatics (Coulomb) E, D Magnetostatics (Ampere) H, B E&M (Waves) E&H or D&B...
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This note was uploaded on 10/13/2009 for the course ECE 2112 taught by Professor Ludwig during the Spring '09 term at WPI.

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lec2 - 4 Properties of E-field • Electric field is...

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