Coulomb's Law Formula:
Coulomb's formula for the force of attraction or repulsion between two point charges is given by:
F = k * |q1 * q2| / r^2
Where:
- F is the force between the two charges,
- k is the Coulomb constant (8.9875 x 10^9 N m^2/C^2),
- q1 and q2 are the magnitudes of the two charges,
- r is the distance between the charges.

Explanation:
- Force Calculation: Coulomb's Law states that the magnitude of the force between two point charges is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them.
- Direction of Force: The force can be attractive or repulsive depending on the signs of the charges. Like charges (both positive or negative) repel each other, while opposite charges attract each other.
- Coulomb's Constant: The Coulomb constant, denoted by k, is a proportionality constant that depends on the medium between the charges. In a vacuum, k is approximately 8.9875 x 10^9 N m^2/C^2.
- Unit of Force: The unit of force in Coulomb's Law is Newton (N), which is the SI unit of force. It is a vector quantity with direction determined by the charges.
- Inverse-Square Law: The force between charges follows an inverse-square law, meaning that the force decreases as the square of the distance between the charges increases.
By using Coulomb's Law, one can calculate the force of attraction or repulsion between two point charges accurately, which is crucial in understanding the behavior of electric fields and interactions between charged particles.