For a homogeneous and isotropic medium with a charge density $$\rho$$ & dielectric constant $$\epsilon$$, the Poisson’sequation for electrical potential V is :

A

$$ \triangledown^{2} V=\frac{\rho}{\epsilon}$$

B

$$ \triangledown^{2} V=-\frac{\rho}{\epsilon}$$

C

$$\triangledown.V=\frac{\rho}{\epsilon}$$

D

$$\triangledown.V=-\frac{\rho}{\epsilon}$$