Force Between Two 1 µC Charges 1 m Apart
Two 1 µC point charges separated by 1 m experience a repulsive force of about 0.00899 N (8.99 mN).
How to use this tool
- Enter charge q₁, charge q₂ and separation r in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your electrostatic force and the full breakdown beneath it.
Increasing the separation from 10 cm to 1 m reduces the electrostatic force by a factor of 100, illustrating the inverse-square law.
Frequently asked questions
- What is Coulomb's constant k?
- k = 1/(4πε₀) ≈ 8.9875×10⁹ N·m²/C², where ε₀ is the permittivity of free space. It appears in all electrostatic force calculations.
- What is a typical charge magnitude?
- 1 μC (1×10⁻⁶ C) is typical in electrostatics experiments. An electron carries 1.602×10⁻¹⁹ C.