- #1
Fabio010
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Homework Statement
A sphere of radius R carries a polarization
[itex]\vec{P}[/itex]= k[itex]\vec{r}[/itex],
where k is a constant and [itex]\vec{r}[/itex] is the vector from the center.
Find the field inside and outside the sphere.
In solution, the field outside sphere is 0.
I interpreted that as the field produced by the polarization charges.
Their sum is 0. So, the outside field is zero.
My problem is inside sphere.
Can i consider always the electric field inside a sphere as -[itex]\frac{1}{3εo}[/itex]*[itex]\vec{P}[/itex]
??
Because the formula -[itex]\frac{1}{3εo}[/itex]*[itex]\vec{P}[/itex] is obtained by a uniformly polarized sphere.
In the exercise [itex]\vec{P}[/itex] is not uniform.