1)The interaction of a given electron with other electrons and positive ions in between collisions is negligible.
2)Collisions are instantaneous events that abruptly alter the velocity of an electron. Drude attributed this collisions to the bouncing off of electrons from the impenetrable .
3) The probability of an electron undergoing a collision in any infinitesimal time interval of length dt is given by dt/T where T is the relaxation time.
4) Electrons are assumed to achieve thermal equilibrium with their surroundings only through collisions.
johnson mwenjera answered the question on November 20, 2017 at 16:55
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