# Charge Density – types of electric charge density, & formulas

In this post, we will talk about electric charge density for the distribution of charge, types of such charge densities, formulas, and their application areas.

## Electric Charge Density – types

3 types of electric charge density are discussed here. These are Surface Charge Density, Line Charge Density, and Volume Charge Density.

## Surface Charge Density

Surface Charge Density is the amount of electric Charge per unit area of the surface, where the charge is distributed over a surface.

Surface Charge Density (sigma or σ)
= Total Charge distributed on the surface / Area of the surface
= Q/A

Application: This surface charge density concept is used to Find the electric field intensity due to a thin sheet of charge.

## Line Charge Density

Line Charge Density is the amount of electric Charge per unit length, where the charge is distributed along a line.

Line Charge Density (lambda or ƛ)
= Total Charge distributed along the line/length of the line
= Q/L

Application: This line charge density concept is used to find the electric field intensity due to a long line of charge.

## Volume Charge Density

Volume Charge Density is the amount of electric Charge per unit volume, where the charge is distributed in a volume.

Volume Charge Density (rho or ρ) = Total Charge distributed in the volume / total volume = Q/V

## Charge Density Formulas

σ = Q/A

ƛ=Q/L

ρ = Q/V

So we have covered the following sub-topics in this post.

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Charge Density – types of electric charge density, & formulas
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