What is the order of magnitude of drift velocity of electrons in a conductor ? Deduce the relation between the current flowing through a conductor and drift velocity of electrons in it.
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The two most important formulas related to drift velocity are
\[
\boxed{I=neAv_d}
\]
and
\[
\boxed{J=nev_d}.
\]
Also remember that the drift velocity of electrons in an ordinary conductor is very small, typically of the order of
\[
\boxed{10^{-4}\ \text{m s}^{-1}}.
\]