Fabio010
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Homework Statement
A sphere of radius R carries a polarization
\vec{P}= k\vec{r},
where k is a constant and \vec{r} 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 -\frac{1}{3εo}*\vec{P}
??
Because the formula -\frac{1}{3εo}*\vec{P} is obtained by a uniformly polarized sphere.
In the exercise \vec{P} is not uniform.