Coulumb's Law

Description:

The magnitude the force between the two charges is directly proportional to the scalar product of magnitude of the two charges and inversely proportional to the square of distance between them, and the force applied will always be along the line joining the two charges.

F ∝ 1/r²

(Inverse square law)

F = C q₁ q₂/r²

Where

• ‘q₁ and q₂’ are point charges.

• ‘F’ in the force between the charges.

• ‘r’ is the distance between the charges.

• ‘C’ is the coulumbs constant.

Note − 1. Value of C depends on medium.

2. For free space value of C = 9 × 10⁹ NM²C^-2

For free space F = 9 × 10⁹ q₁q₂/r²