A copper wire has radius r = 0.424 cm, is 6.00 m long, has resistivity ? = 1.72·10-8 ? m, and carries a current of 0.227 A. The wire has density of charge carriers of 8.50·1028 electrons/m3.
a) What is the resistance, R, of the wire?
b) What is the electric potential difference, ?V, across the wire?
c) What is the electric field, E, in the wire?