Coulomb's Law

Coulomb's Law

### Formula

$$F=\frac{1}{4\pi\epsilon_0}\frac{q_1q_2}{r^2}$$

### Terminologies

- F → Electrostatic force.

- q₁, q₂ → Magnitudes of charges.

- r → Distance between charges.

- ε₀ → Permittivity of free space.

### SI Unit

$$Newton(N)$$

### Conditions / Special Cases

- Force is attractive for unlike charges.

$$q_1q_2<0$$

- Force is repulsive for like charges.

$$q_1q_2>0$$

### Usage

- Used to calculate force between point charges.