Physics 481

A point charge $+q$ is placed at the center of a neutral, linear, homogeneous, dielectric teflon shell. Can $\mathbf{D}$ be computed from its divergence?

$\oint \mathbf{D} \cdot d\mathbf{A} = Q_{free}$

Yes
No
Depends on other things not given

A point charge

$+q$ is placed at the center of a neutral, linear, homogeneous, dielectric teflon shell. Can

$\mathbf{D}$ be computed from its divergence?

$\oint \mathbf{D} \cdot d\mathbf{A} = Q_{free}$ Yes No Depends on other things not given

Boundary Conditions

Why are these boundary conditions useful?