# Electric lines of force

by Shan K
Tags: electric, force, lines
 P: 58 can any one tell me how to calculate the electric lines of force of an arbitrary electric charge configuration ? i have heard that in static case there is no electric field inside a conductor . i now wanna know that is there any dynamical case for the conductor instead of static ?
 P: 1,020 it can be very difficult to know the nature of field lines in general case.Even in two charge case,one use prolate ellipsoidal coordinate to draw equipotentials and determining the nature of force lines.In static case,there is no field inside a conductor but in presence of say a time varying magnetic field there can be an electric field inside it.
P: 58
 Quote by andrien it can be very difficult to know the nature of field lines in general case.Even in two charge case,one use prolate ellipsoidal coordinate to draw equipotentials and determining the nature of force lines.
but in a book i have seen it but i can't undetrstand . they taken that electric field is parallal to a small elementary distance dl . but i cant understant what dl is . the distance from whom and to whom ?

P: 162
Electric lines of force

 Quote by Shan K but in a book i have seen it but i can't undetrstand . they taken that electric field is parallal to a small elementary distance dl . but i cant understant what dl is . the distance from whom and to whom ?
Distance is when you are talking about FORCE lines and two objects. For FIELD lines you only need one object, so I guess you are interested in field lines, but what kind of object: wire, surface or distribution of point charges?