0ELECTROSTATIC POTENTIAL
An object at a certain height from the ground will always have some energy called potential energy. Similar to that a charge at a certain distance from another charge will also have an electrostatic potential.
The electrostatic potential V at any point is defined as the work done in bringing a unit positive charge from infinity to that point.
In bringing the unit positive charge from infinity to a point, we must do some work against the force of repulsion (if we assume that another charge is also positive)
The Work done by the force in bringing a unit positive charge from infinity to a point will be equal to the electrostatic potential (V ) at that point.
Potential due to a point charge, q is given by V = q / 4πε0 r
where q - charge, ε0 - permittivity of free space and r - distance between the charges
EQUIPOTENTIAL SURFACES
An equipotential surface can be defined as the surface which will have a constant value of the potential at all points on its surface.
