Question

# Explain drift velocity with its equation.

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Solution

## Drift velocity:A conductor has a large number of free electrons, so we can consider this as a gaseous medium, we called this electron gas. In the presence of an external field, the slow movement of the electron cloud in a particular direction is called drifting. The rate of change of its displacement is called drift velocity. The order of drift velocity is ${10}^{-5} \mathrm{m}/\mathrm{s}$.The equation to find the drift velocity:${\mathrm{v}}_{\mathrm{d}}=\frac{\mathrm{I}}{\mathrm{nAq}}$Here,${\mathrm{v}}_{\mathrm{d}}$ is the drift velocity.$\mathrm{I}$ is the current through the conductor.$\mathrm{A}$ is the cross-sectional area conductor.$\mathrm{q}$ is the charge of the electron$\mathrm{n}$ is the electron density of the conductor.

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