An electric field is a physical quantity that describes the influence that electric charges have on each other. An electric field is a vector field, meaning that it has both a magnitude and a direction at each point in space.
Point charges are electric charges that are concentrated at a single point in space. The electric field created by a point charge at a point in space is given by Coulomb’s law:
E = k*q/r^2
where E is the electric field at the point, k is Coulomb’s constant, q is the charge of the point charge, and r is the distance between the point charge and the point where the electric field is being measured.
The direction of the electric field at a point in space is the direction in which a small positive test charge would be pushed or pulled if it were placed at that point. For a positive point charge, the electric field points radially outward from the charge, while for a negative point charge, the electric field points radially inward towards the charge.
The magnitude of the electric field decreases as the distance from the point charge increases. Therefore, the electric field created by a point charge becomes weaker as the distance from the charge increases. For more information see the video attached
Physical sciences break 1.0 