Wire Resistance Calculator — Fórmula
## Wire Resistance
The resistance of a wire depends on the material, its length, and cross-sectional area.
### Formula
**R = ρ * L / A**
where ρ is the resistivity of the material (Ω·m), L is the wire length, and A is the cross-sectional area. Copper has ρ = 1.68 x 10^-8 Ω·m.
The resistance of a wire depends on the material, its length, and cross-sectional area.
### Formula
**R = ρ * L / A**
where ρ is the resistivity of the material (Ω·m), L is the wire length, and A is the cross-sectional area. Copper has ρ = 1.68 x 10^-8 Ω·m.
Ejemplo Resuelto
100 m of copper wire with 2.5 mm² cross-section.
- R = ρ * L / A
- R = 1.68e-8 * 100 / 2.5e-6
- R = 1.68e-6 / 2.5e-6
- R = 0.672 Ω