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Question

Explain drift velocity with its equation.


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Solution

Drift velocity:

  1. A conductor has a large number of free electrons, so we can consider this as a gaseous medium, we called this electron gas.
  2. In the presence of an external field, the slow movement of the electron cloud in a particular direction is called drifting.
  3. The rate of change of its displacement is called drift velocity.
  4. The order of drift velocity is 10-5m/s.

The equation to find the drift velocity:

vd=InAq

Here,

vd is the drift velocity.

I is the current through the conductor.

A is the cross-sectional area conductor.

q is the charge of the electron

n is the electron density of the conductor.


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