Physics, asked by pragati1169, 1 year ago

relation between drift velocity of free electrons and current density

Answers

Answered by MDsaalim
2
sol:
i=neAVd or i/A=neVd where i/A =current density.

pragati1169: Nice
Answered by RakeshPateL555
2

Drift Velocity of Free Electrons

When a potential difference is applied across the ends of a conductor, the free electrons in it move with an average velocity opposite to direction of electric field. which is called drift velocity of free electrons.

Drift velocity vd = eEτ / m = eVτ / ml

where, τ = relaxation time, e = charge on electron,

E = electric field intensity, 1 = length of the conductor,

V = potential difference across the ends of the conductor

m = mass of electron.

Relation between electric current and drift velocity is given by

vd = I / An e

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