Electric potential at a point is defined as the amount of work needed to move a unit charge from a reference point to a specific point against the electric field. When an object is moved against the electric field, it gains some amount of energy which is defined as the electric potential energy. The electric potential of the charge is obtained by dividing the potential energy by the quantity of charge. The electric potential at a point in an electric field is the work done per unit charge when a point positive charge is moved from infinity to the point. The electric potential is a scalar quantity and is independent of whether a charge should be placed in the electric field or not.

The electric potential of an object depends on several factors, including the electric charge the object carries and the relative position with other electrically charged objects. The strength of the electric field depends on the electric potential. At a point charge +q, there is always the same potential at all points with a distance r. The electric potential at any point at a distance r from the positive charge +q is given by the expression: V = kq/r, where k is the Coulomb constant.

In summary, electric potential at a point is the amount of work done per unit charge when a point positive charge is moved from infinity to the point against the electric field. It is a scalar quantity and depends on the electric charge and the relative position with other electrically charged objects.