Question

At which point the drift velocity would be maximum in a non uniform field

Answer 1

In steady state, current in a conductor is constant.

Since current (I)=n*e*A*V(d) where V(d) is drift velocity, A is cross sectional area, n is number of chargers per unit volume and e is fundamental unit of charge.

Since I, n, e are constant for a given conductor,

V(d)*A=(I/n*e)=constant.

So V(d)*A is constant.

This means velocity is higher in areas of lower cross section and lower in areas of higher cross section.

So drift velocity changes in conductors with non uniform cross sections.