It probably should be noted that the reason the drift velocity is so much lower than velocity due to thermal motion is that electrons cannot move very far before they collide with an atom which changes their direction.
The mean distance they move in a copper wire between collisions is about 0.00000004 meters. At 100 km/s it would take 0.4 picoseconds to travel that distance.
The mean distance they move in a copper wire between collisions is about 0.00000004 meters. At 100 km/s it would take 0.4 picoseconds to travel that distance.