Charge Density

Charge density: Charge per unit length, surface area or volume depending on the charge distribution.

Linear charge density $\lambda$ or ${\rho }_l$: Total charge given by $Q={\int }_L{\rho }_{l}dl$

$dQ={\rho }_{l}dl$

Surface charge density: $\eta =Q/A$

$Q={\int }_S{\rho }_{s}dS$

1D	2D	3D: Volume
$dq={\rho }_{L}dL$	$dq={\rho }_{S}dS$	$dq={\rho }_{V}dV$

Volume Charge Density. ${\rho }_v$

$Q={\int }_v{\rho }_{v}dv$