Coulomb's Law Calculator
Calculate electrostatic force using F = kq₁q₂/r². Enter two charges and the distance between them.
How to Use the Coulomb's Law Calculator
- Enter the magnitude of the first charge in coulombs.
- Enter the magnitude of the second charge in coulombs.
- Enter the distance between the charges in meters.
快速参考
| 从 | 到 |
|---|---|
| Two 1 C charges at 1 m | 8.988×10⁹ N |
| Electron–proton at 5.3×10⁻¹¹ m | 8.2×10⁻⁸ N |
| Two 1 μC at 0.1 m | 0.899 N |
| 1 C | 6.242×10¹⁸ elementary charges |
使用场景
- •Calculating forces between charged particles.
- •Electrostatics problems in physics courses.
- •Designing capacitors and electronic components.
公式
F = k × q₁ × q₂ / r², where k = 8.988×10⁹ N·m²/C², q₁ and q₂ are charges (C), r is distance (m).
常见问题
What is Coulomb's constant?
k = 8.988×10⁹ N·m²/C², also written as 1/(4πε₀). It determines the strength of the electrostatic force.
Is the force attractive or repulsive?
Like charges repel and opposite charges attract. This calculator gives the magnitude of the force.
Is this calculator free?
Yes, all OhMyCalc calculators are completely free.