I believe you may be referring to “Coulomb’s Law.” Coulomb’s Law is a fundamental principle in physics that describes the electrostatic interaction between electrically charged particles. It states that the force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.
Mathematically, Coulomb’s Law can be expressed as:
F = k * (q₁ * q₂) / r²
where:

• F is the electrostatic force between the two charged objects,
• k is the electrostatic constant,
• q₁ and q₂ are the magnitudes of the charges of the two objects, and
• r is the distance between the charges.

Coulomb’s Law helps to understand how electric charges interact with each other and is often used to calculate the forces between charged particles in various contexts, such as in the study of electricity, magnetism, and atomic structures.