## Charge Density Formula :

##### Linear charge Density,

**λ=q/l**

Where,

Q→ charge and I is the length over which it I s distributed

S.I unit of linear charge density is coulomb/m

##### Surface Charge Density,

**Σ=q/A**

Where,

q → charge and A is the area over which it is distributed

S.I. unit of Linear charge density is coulomb/m^{2}

##### Volume charge Density,

**P=q/v**

Where,

q → charge and V is the volume over which it is distributed

S.I unit of Linear charge density is column/m^{3}:

### Example :

Calculate the charge density if a charge of 4 c is present in a cube of 5 m^{2}

### Solution :

Given,

Charge q=4c

Volume v=5 m^{2}

The charge density formula is given by

P=q/v

=5/4

Charge density p=1.25c/ m^{3}