Current Density

#Physics

Topics

• Surface Current Density
• Displacement Current
• Polarization Current
• Free Current Density
• Bound Current Density

$\displaystyle \vec{J}\equiv \frac{\mathrm{d}\vec{I} }{ \mathrm{d}a_{\perp}}$

• $\displaystyle \vec{I}$ is the current
• $\displaystyle a_{\perp}$ is the cross-sectional area of the part the current flows through
  

$\displaystyle \vec{J}=\rho \vec{v}$