**Charge Density-**

The **electric charges** may be distributed on extended or continuous bodies.

The electric charge distributed per unit dimension (length, area or volume) is called as charge density. |

**Types of Charge Densities-**

**There can be three types of charge densities-**

- Linear charge density
- Surface charge density
- Volume charge density

**1. Linear Charge Density-**

The **electric charge distributed per unit length** is called as linear charge density. It is denoted by **λ**.

**If charge Q is distributed over a thin wire of length L, then its linear charge density is given by-**

- Its SI unit is
**coulomb per meter**denoted as**Cm**.^{-1} - Its dimensional formula is
**[M**.^{0}L^{-1}T^{1}A^{1}]

**2. Surface Charge Density-**

The **electric charge distributed per unit area** is called as surface charge density. It is denoted by **σ**.

**If charge Q is distributed over a surface of area A, then its surface charge density is given by-**

- Its SI unit is
**coulomb per square meter**denoted as**Cm**.^{-2} - Its dimensional formula is
**[M**.^{0}L^{-2}T^{1}A^{1}]

**3. Volume Charge Density-**

The **electric charge distributed per unit volume** is called as volume charge density. It is denoted by **ρ**.

**If charge Q is distributed over a volume V, then its volume charge density is given by-**

- Its SI unit is
**coulomb per cubic meter**denoted as**Cm**.^{-3} - Its dimensional formula is
**[M**.^{0}L^{-3}T^{1}A^{1}]

**Read the next article on-**

**Electric Field Due To A Thin Infinite Long Line Charge**

**Get more notes & other study material of the Chapter** **Electric Charges & Field**.