A visual representation of the electric field can be obtained in term of electric field lines; an idea proposed by Michael faraday. Electric field lines can be thought of a “map” that provides information about the direction and strength of electric field at various places. As electric field lines provide information about the electric force exerted on a charge, the lines are commonly called “lines of force”.
Corresponding field lines show the field direction. The electric field lines of a negative charge are directed radially inward, because the force on the positive test charge is know of attraction, indicating the electric field points inward.