EngiRef / Electrical Engineering Formula
Coulomb's Law
Coulomb's Law: Force between two point charges. A DC Circuits formula in electrical engineering. Variables F, kₑ, q₁, q₂ and r, each with SI and imperial units.
DC Circuits
Specification
- Name
- Coulomb's Law
- Discipline
- electrical
- Category
- DC Circuits
- LaTeX
- F = k_e \frac{q_1 q_2}{r^2}
- Description
- Force between two point charges
- Can solve for
- F, q₁, q₂, r
- Tags
- coulomb, charge, force, electric
Variables
| Symbol | Name | Unit | Si Unit |
|---|---|---|---|
| F | Force | N | N |
| kₑ | Coulomb Constant | N·m²/C² | N·m²/C² |
| q₁ | Charge 1 | C | C |
| q₂ | Charge 2 | C | C |
| r | Distance | m | m |
Common questions
- What is the Coulomb's Law formula?
- Force between two point charges. It sits under DC Circuits, Electrical engineering in the EngiRef reference.
- What do the symbols in the Coulomb's Law formula mean?
- In Coulomb's Law, F is force in N; kₑ is coulomb constant in N·m²/C²; q₁ is charge 1 in C; q₂ is charge 2 in C; r is distance in m.