An electric charge is a physical property of matter that causes it to experience a force when placed in an electromagnetic field. It is measured in units of coulombs (C).
A positive charge is an excess of protons in an atom, while a negative charge is an excess of electrons. These charges attract each other, while like charges repel each other.
An electric force is the force exerted between two charged objects. It is directly proportional to the magnitude of the charges and inversely proportional to the square of the distance between them.
An electric field is a region around a charged object where the electric force is exerted on other charged objects. The strength of the electric field is determined by the magnitude of the charge and the distance from the object.
Electric potential is the electric potential energy per unit charge at a certain point in an electric field. Electric potential energy is the potential energy of a charged object in an electric field, which is equal to the work done to move that object from one point to another in the field.