# Electric Lines of Force & its Properties

#### Electric Lines of force :

The line of force in an electric field is a curve such that the tangent at any point on it gives the direction of the resultant electric field strength at that point.

These imaginary lines give us a method of representing any electric field on a diagram.

It has been found quite convenient to visualize the electric field pattern in terms of lines of force. The electric field pattern vector at a point is related to imaginary lines of force in two ways. The line of force in an electric field is a curve such that the tangent at any point on it gives the direction of the resultant electric field strength at that point. Electric lines of force have following properties

##### Properties of Electric Lines of Force:

(i) Tangent to the line of force at a point gives the direction of Electric field .

(ii) These lines of force are so drawn that their number per unit cross-sectional area in a region is proportional to intensity of electric field.

(iii) Electrostatic lines of force can never form closed loops.

(iv) Lines of force are imaginary.

(v) They emerge from a positive charge and terminate on negative charges.

(vi) Lines of force do not intersect.

Note: When a conductor has a net charge that is at rest, the charge reside entirely on the conductor’s surface and the electric field is zero everywhere within the material of the conductor.