1. ECE 305 Electromagnetic Theory
Fall 2016
ECE 305 Electromagnetic Theory
Lecture 4: Chapter 4 Electrostatic Fields
Part 3 (§4.7, 8, 9 and 10)
Qiliang Li
Dept. of Electrical and Computer Engineering, George Mason University, Fairfax, VA

2. §4.7 Electric Potential
Suppose we move a point charge Q from A to B in an electric field E Force: F = Q E Work is done to displace the charge Q by dl potential difference b/w A and B

3. §4.7 For example:

4. For different situations:
(C is constant determined by reference point )

5. example 4.10 example 4.11

6. example 4.11 solution Find ρ, r and C

9. §4.8 Relationship between E and V – Maxwell’s Equation
The potential difference between A and B is independent of path taken:
For an enclosed path L

10. §4.9 An Electric Dipole and Flux Lines

11. §4.10 Energy Density in Electrostatic Fields

12. For continuous charge