4. Coulomb's Law

Coulomb’s Law Formula

Let us imagine, Q1 and Q2 are the electrical charges of two objects.
d is the distance between the center of the objects.

Coulomb's law

The charged objects are placed in a medium of permittivity εoεr

Then we can write the force ‘F’ as:

The equation above is the formula for Coulomb’s Law. This formula allows us to calculate the electrostatic force that two charges exert on each other.

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