What Are The Properties Of Electric Lines Of Force?

*electric lines of force starts from positive charge end at negative charge
*they may be straight or curved
*they are imaginary lines they don not exist physically
*they are neutral the surface of charged conductor
*they cannot pass through charged conductor
*number of electric lines of force per unit area is directly proportional to electric field intensity at that point
*density of ELF are more in the strong filed and less in weak field

The invention of electric lines of force was done by famous scientist Michael Faraday. These do not provide the full info about electric field, but provide us with quantitative partial information.

Def: Electric lines of force can be defined as a way or path, it may be straight or curved, so that the tangent at any point to it gives the direction of the electric field intensity at that point.
Line AB below in figure is an electrostatic line of force. So the tangent to the line p will give us the direction of electric field intensity

at point P.