(a) In a metal, the electrons can be assumed to be essentially free. Show that the drift velocity of the electron satisfies the following equation
where ν represents the collision frequency. Calculate the steady state current density (J = – N q v) and show that the conductivity is given by
(b) If r represents the displacement of the electron, show that
which represents the polarization. Using the above equation show that
which represents the dielectric constant variation for a free electron gas.
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