Graphical visualization of electric field in given region is done by electric lines of forces. Electric lines of force is such type of imaginary curve in any given electric field, tangent on which indicates the direction of net electric field.
PROPERTIES OF ELECTRIC FIELD LINES=
1.It starts from positive point charge and moves radially outward.They end at infinity.
2.Field lines produced due to negative charge start from infinity and directed towards the negative charge.
3.Field lines start from positive charge and end towards negative charge.
4.These lines do not form closed loop.[*field lines in induced electric field may form closed loop,since such field is non-conservative.]
5.Field lines have the tendency of contraction along the length. This indicate that opposite charges have attraction.
6. Properties of lateral expansion indicates that like charges repel each other.
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