1. Mar 9, 2014

### Mahmoud Shaban

is there any precise proof for gauss law?
why ø=q/ε always regardless how the charge is distributed inside the surface
and if anyone know a good book for electromagnetism please type its name for me..
thank u

Last edited by a moderator: Mar 9, 2014
2. Mar 9, 2014

### SteamKing

Staff Emeritus
3. Mar 9, 2014

### dauto

Try Introduction to Electrodynamics by David J. Griffiths

4. Mar 10, 2014

### jaredvert

Every guassian surface can be described as a point charge. Electric field equals firce field lines per area. So the number of field lines equals e times a.

5. Mar 10, 2014

### Mahmoud Shaban

thank u all
SteamKing, although the proof is complicated for me (advanced calculus for my level) , im relieved to know at least that there is a precise proof applicable for all shapes not only spheres!! so thank u again

6. Mar 10, 2014

### Mahmoud Shaban

sorry,, i dont get what you are trying to say..
why would we describe a gaussian surface as apoint charge??