Question

what is the formula of drift velocity​

Answer 1

Answer:

In physics a drift velocity is the average velocity attained by charged particles, such as electrons, in a material due to an electric field. In general, an electron in a conductor will propagate randomly at the Fermi velocity, resulting in an average velocity of zero.

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Answer 2

Drift velocity is proportional to current. In a resistive material, it is also proportional to the magnitude of an external electric field. Therefore, Ohm’s law can be explained in terms of drift velocity as:

u = μE

where u is drift velocity, μ is the electron mobility of electron, and E is the electric field. These quantities’ units are m/s, m2/(V·s), and V/m, respectively.