I am really poor at the basics of electromagnetic theory, can any one suggest a nice online resource?

 

To be honest, electromagnetics is a tough subject and you must practice it. I have taken many engineering courses, which I am able to teach myself in a about 6-10 days. On the other hand, electromagnetics is taking about 3X the time to learn.

http://hyperphysics.phy-astr.gsu.edu/hbase/HFrame.html

 

Hello,

Here is a link from the EDUCYPEDIA on magnetism and electricity.
http://www.educypedia.be/electronics/electricitymagnetisme.htm

Greetings,
Bertus