免费库仑定律计算器

使用库仑定律计算两个点电荷之间的静电力。

C
C
m

Electrostatic Force

7.1900 N

Electrostatic Force vs Charge 1

查看公式 →

公式

## Coulomb's Law Coulomb's law gives the magnitude of the electrostatic force between two point charges. ### Formula **F = k * |q1 * q2| / r²** where k = 8.9875 x 10^9 N·m²/C². Like charges repel, unlike charges attract.

计算示例

Two charges (1 μC and 2 μC) separated by 5 cm.

  1. 01F = k * |q1 * q2| / r²
  2. 02F = 8.9875e9 * |1e-6 * 2e-6| / 0.05²
  3. 03F = 8.9875e9 * 2e-12 / 0.0025
  4. 04F = 0.01798 / 0.0025 = 7.19 N