1. Enter the Values
2. Calculated Result
Electrostatic Force
Enter the values and click Calculate.
3. Step-by-Step Solution
Enter values above to generate the complete solution.
4. Coulomb's Law Diagram
5. 3D Electric Field Visualization
Force field relationship
Change a value to see the 3D model respond.
6. Coulomb's Law Graphs
Force vs Distance
The force decreases according to the inverse-square law.
Force vs Charge q₁
Force is directly proportional to the magnitude of charge.
7. Important Relationships
Increasing q₁ increases the force.
Increasing q₂ increases the force.
Force depends on both charges.
Force decreases rapidly with distance.
8. Physical Explanation
9. Theory
What is Coulomb's Law?
Coulomb's Law states that the electrostatic force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.
Formula
F = k |q₁q₂| / r²
Where:
F = electrostatic force in Newtons (N)
q₁ and q₂ = electric charges in Coulombs (C)
r = distance between the charges in metres (m)
k = Coulomb's constant
Attraction and Repulsion
Like charges repel each other, while unlike charges attract each other.
Inverse-Square Law
If the distance between two charges is doubled, the electrostatic force becomes one-fourth of its original value.
F ∝ 1/r²