Hi friends!!! I know this is a question many people might have posted on the forum. I saw many threads but still have some doubt in my mind, about why do electrons flow in a wire when we attach a battery to it. Being more specific, my doubts are as follows :- (1) My book says that an electron will emerge with an acceleration a = -eE/m. How come it emerges with uniform acceleration when electric field is applied. That too when it suffers collisions and moves under random motion, i.e. how can we be so decisive about it's acceleration? Then they have applied formula for uniform acceleration : v = u + at. (2) How come the electric field in the wire is uniform throughout? (3) I also need some detail about the random motion of the electrons before and after the field is applied, i.e. the path when the flow of the electrons is biased in one direction.