11. Drift velocity not field propagation velocity.12. The drift velocity is related to the average scattering time as becomes evident from the following relations. 13. If \ vec { F } is the force on one particle, then the drift velocity is 14. Every constituent ion of air has a different ion drift velocity -because it depends on mass. 15. This means that mobility is a somewhat less useful concept, compared to simply discussing drift velocity directly. 16. The drift velocity reaches a peak at an intermediate electric field and undergoes a small drop at higher fields. 17. More generally, the Stokes drift velocity is the difference between the average his 1847 study of water waves. 18. The " drift velocity " is the average velocity of the charge carriers in the drift current. 19. When an electric field is applied across the semiconductor material, the charge carriers attain a certain drift velocity . 20. Several hindsight studies applying techniques included in this manual failed to predict either the correct drift velocities or direction.
