Introduction
The drift velocity is an average velocity like an electron which obtains charge in it because of electric field. It is also called an axial drift velocity. Drift velocity is denoted by (u). In other words "When an electron will propagate randomly in a conductor, an applied electric field will give this random motion a small net flow velocity in one direction".Explanation
In a semi conductor, there are two main scattering mechanisms; impurity scattering and lattice scattering. Both are ionized to each other. This is because of the current is directly proportional to the drift velocity in which a resistive material is proportional to the magnitude of an external electric field. Ohm's law is also explained according to these terms.Formula
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Measurement
When a pulsed ultraviolet nitrogen is used to excite the drift and cathode of a micro mega detector. The signals start inducing on the terminal of anode and should be read with current amplifier and you can take measurements easily.Image Source
