Question

-.
A copper wire has a diameter 1.02 mm & carries
a constant current of 1. 67A. If the density of
Free electrons in the copper is 8.5x10^28/m3. calcu-
late the current density & drift velocity of
the electrons.​

Answer 1

Answer:

(density)*(area)*(drift velocity)*(electron charge) = current, in Amperes.

Solve for the drift velocity, which will probaby be slow.

Current density is (total current)/(area)

The "area" in both cases is pi*D^2/4, and should be expressed in square meters.

Explanation: