Module 2 : Electrostatics
Lecture 11 : Conductors and Dielectric
     Potential due to a dielectric
  Consider the dielectric to be built up of volume elements $d\tau$. The dipole moment of the volume element is $\vec P d\tau$
  The potential at a point S, whose position vector with respect to the volume element is $\vec r$is
 
\begin{displaymath}d\phi = \frac{1}{4\pi\epsilon_o} \frac{\vec P\cdot\hat r}{r^2}d\tau\end{displaymath}
 
\includegraphics{fig48.eps}
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