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## Homework Statement

I want to solve the following two interlinked (simultaneous) Partial Differential Equations using FEMLAB. The equations are:

[tex]

\[\frac{\partial^2 \psi}{\partial^2 x} = - \frac{q}{\epsilon} p \]

\[p \frac{\partial^2 \psi}{\partial^2 x} + \frac{\partial \psi}{\partial x} . \frac{\partial p}{\partial x} = 0 \]

q = 1.6e-19

\[\epsilon = 3*8.854e-12 \]

[/tex]

## Homework Equations

How to Solve using FEMLAB?? or any PDE solver...

## The Attempt at a Solution

confused