how does drift velocity of electron in a metallic conductor vary with temperature?

vd = (TeE)/m


vd = is drift velocity

e = charge of electron

E = electric field

m = mass of electron

T = relaxation time


which implies that drift velocity is directly proportional to relaxation time.


relaxation time is the time interval between successive collisions of an electron during its flow in a conductor. On increasing temperature, the electrons move faster and more collisions occur quickly.

Hence relaxation time decreases with increase in temperature


which implies that drift velocity also decreases with temperature.

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I = neAVd 

V/R = neAVd 

Vd= V/RneA 

as the temperature will increase resistance will increase ( due to more succesive collisions between the electrons ) .

so Vd will decrease

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Drift velocity will remain same with the increase in temperature
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I am sry for the answer,drift velocity will decrease with the increase in temperature
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When temperature increases then the velocity of moving of electrons increses then the relaxation time decreases. As time decreses then drift velocity decreases because drift velocity =(eE ? relax ation time)?m
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Hope this helps!

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  • -5
Answer is not proper

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as temperature increases the drift velocity will be decrease because relaxation time is decreasing .
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Here you go
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