A copper wire with a diameter of 1.3 mm has a uniform electric field of 0.45 V/m imposed along its entire length. The temperature of the wire is 36°C. Assume one free electron per atom.
a. Determine the resistivity of the wire.
b. What is the current density in the wire?
c. What is the total current in the wire?
d. What potential difference must exist between the ends of a 4-m length of the wire to produce the stated electric field?