Coulomb's law is a fundamental law of electrostatics that describes the force between two stationary electrically charged particles. It states that the force between two charges is directly proportional to the product of their magnitudes and inversely proportional to the square of the distance between them.
An electric charge is a fundamental property of matter that causes it to experience a force when placed in an electric field. It is measured in units of coulombs (C) and can be either positive or negative.
Like charges are charges that have the same sign (both positive or both negative), while unlike charges are charges that have opposite signs (one positive and one negative). Like charges repel each other, while unlike charges attract each other.
The principle of superposition states that the total force on a charge due to multiple charges is equal to the vector sum of the individual forces on that charge due to each individual charge.
The strength of the electric force between two charges is inversely proportional to the square of the distance between them. This means that as the distance between two charges increases, the strength of the force decreases. Conversely, as the distance decreases, the force increases.