Define mobility of a charge carrier.what is it's relation with relaxation time?
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The mobility of a charge carrier is defined as the average velocity with which the free electrons move towards the positive end of a conductor under the influence of an external electric field applied .
vd=eEmτ
Where , e , m =charge and mass of electron ,
E = electric field ,
τ = Relaxation time
vd=eEmτ
Where , e , m =charge and mass of electron ,
E = electric field ,
τ = Relaxation time
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