1. Edward C. Jordan Memorial Offering of the First Course under the Indo-US Inter-University Collaborative Initiative in Higher Education and Research: Electromagnetics for Electrical and Computer Engineering by
Nannapaneni Narayana Rao
Edward C. Jordan Professor of Electrical and Computer Engineering
University of Illinois at Urbana-Champaign
Urbana, Illinois, USA
Amrita Viswa Vidya Peetham, Coimbatore
July 10 – August 11, 2006

2. 5.2 Potential Functions for Static Fields

3. For static fields,

4. But,
also known as the potential difference between A and
B, for the static case.

5. Given the charge distribution, find V using superposition.
Then find E using the above.
For a point charge at the origin,
Since
agrees with the previously known result.

6. Thus for a point charge at an arbitrary location PQ
P5.9

7. Considering the element of length dz at (0, 0, z), we have
Using

9. Magnetic vector potential due to a current element
Analogous to