Question

Obtain the expression for the current through a conductor in terms of ‘drift velocity’.

Answer 1

we know that,F=Eq. (q=ne) or (q=+-e)
F=Ee..................(1)
F=ma..........(2)
equating RHS

we get ,ma= E.e. ,. a=E.e/m........(3)

vd=vi+at. (vi=0)
vd=E.e.t/m

Answer 2

Answer:

total charge in the conductor,Q=Ne

time taken,t=l/Vd

current flowing across the conductor ,I=Q/t

therefore,NeAVd is the amount of flowing current