[[File:ScreenCapture1.png|thumb|left|350px|Classic Example: Two oppositely charged spheres.]]
| valign="bottom"|
[[File:qsourceiarray.png|thumb|left|150px350px|EMH-Field from array of current loops.Ferma's Charge Source Dialog]]
| valign="top"|
[[File:isource.png|thumb|left|150px|EM.Ferma's Current Source Dialog]]