Question

drive an expression of drift velocity

Answer 1

Answer:

When conductor is subjected to an electric field E, each electron experience a force

F=−eE and acquires an acceleration of

a=F/m=−

m

−eE

..... (1)

Here m= mass of electron, e= charge , E= Electric Field.

The average time difference between two consecutive collisions is known as relaxation time of electron

Answer 2

Answer:

According to $\red{drift\:velocity\:expression}$ , the relaxation time is the time interval between successive collisions of an electron on increasing temperature, the electrons move faster and more collisions occur quickly.