- #1
Pushoam
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Homework Equations
The Attempt at a Solution
A)[/B] In the spherical cavity, let me have a Gaussian Spherical Surface around the center.
Applying Gauss' s Law for dielectrics,
##\oint _S\vec D⋅ d \vec a = Q_{f_{en}} ##
Due to the symmetry of the problem and ## Q_{f_{en}} =0## , ## \vec D = 0 ##.
Since, ## \vec P = 0 ##, ##\vec E ## inside the cavity, too, is zero.
Is this correct?