F = k · q1 · q2 / r²
Drag the charges to change the distance

Charge Properties

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The Mathematics of Static Electricity

Coulomb's Law states that the magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them.

F = 8.99 × 10⁹ · |q₁ · q₂| / r²
(q₁) Positive Charge
(q₂) Negative Charge
F₁₂ : Force on q₁ by q₂
F₂₁ : Force on q₂ by q₁