A current of 1 ampere (1 coulomb per second) is flowing through a copper wire of 4 mm diameter. There are 8.4 x lo2 atoms per cubic meter, and each contributes one electron to the conduction band.
(a) How many conduction electrons are there in one centimeter of this wire?
(b) Roughly what is the net drift velocity of the conduction electrons in this wire?
(c) How does the answer to part (b) compare with the root mean square thermal velocity of free conduction electrons in the wire at room temperature (295 K)?