# Formula Solid Sphere (E-field Inside) Electric charge    Radius

## Electric field

Unit
Radial outwards directed electric field at the field point $$r$$ within a homogeneously electrically charged sphere.

## Electric charge

Unit
It is the amount of charge that is homogeneously distributed within the entire sphere.

## Field point

Unit
Field point points from the center of the sphere to any point inside the sphere where the electric field $$E(r)$$ is present.

Vacuum permittivity occurs in electrical phenomena and is a physical constant with value $$\varepsilon_0 ~=~ 8.854 \,\cdot\, 10^{-12} \, \frac{\text{As}}{\text{Vm}}$$.