Kostenloser Strom Density Rechner
Berechnen Sie current density aus current und area. Kostenloser J = I/A Rechner.
Current Density
4,000,000 A/m²
Current Density vs Current
Formel
## Current Density Current density describes how much current flows through a unit area of a conductor. ### Formula **J = I / A** where I is the current and A is the cross-sectional area of the conductor. High current density causes excessive heating.
Lösungsbeispiel
10 A through a wire with 2.5 mm² cross-section.
- 01J = I / A
- 02J = 10 / 2.5 mm²
- 03J = 4 A/mm²
- 04J = 4,000,000 A/m²
Häufig Gestellte Fragen
What is a safe current density for copper wire?
For continuous operation, copper wire should typically not exceed about 4 to 6 A/mm². Higher densities cause excessive heating.
Why does current density matter?
Current density determines resistive heating in the conductor. Exceeding safe limits can melt insulation or cause fires.
Is current density uniform across a wire?
At DC, yes. At high AC frequencies, the skin effect causes current to concentrate near the wire surface, increasing effective current density.
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