Derive equation of mobility in terms of electric current.

Explanation

`rArr` When n number electron moves with velocity `v_(d)` in conductor of cross-section A current I will be,
I = nAu `d^(e)`
Now, `mu = (v_(d))/(E)`
`therefore v_(d) = mu `E
`I = nA(mu E)e`
`mu = (I)/(n AE e)`
SI unit of `mu = (A)/(m^(-3) xx m^(2) xx (V)/(m) xx C)`
`= (A)/(m^(-2) VC)`
`= m^(2) Omega C^(-1)`