电流密度计算器 — 公式
## 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.
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.
计算示例
10 A through a wire with 2.5 mm² cross-section.
- J = I / A
- J = 10 / 2.5 mm²
- J = 4 A/mm²
- J = 4,000,000 A/m²