What is drift velocity and how this velocity is produced explain???

Dear student 

The electrons move randomly inside a conductor, their average velocity is zero.

But, in the presence of electric field the electrons move in a specific direction (in the opposite direction of electric field) and acquires almost constant velocity. This is known as drift velocity 

WITH REGARDS

MAHIMA 

ASKIITIANS FORUM EXPERT 

In normal state electrons in a metal are having thermal motion which is very high velocity motion of the order 10 ^4m/sec.The direction is at random.It keeps coliding with the ions and getting reflected in different direction.When elcttric field is applied across the conductor a force starts acting on these charges due to this force all the electrons starts drifting in the direction opposit to the E this velocity with avrage value is called drift velocity.This is uniform velocity with no acceleration.All the elcetrons moves in same drift velocity in the same direction opposit yo E.