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Copper has 8.5 x10^28 electrons per m^3 . A 71 cm length of copper wire of...

Copper has 8.5 x10^28 electrons per m^3 . A 71 cm length of copper wire of diameter 2.05 mm carries 4.85A of current. ( For copper: ρ = 1.72 x 10^-8 ohm-m) a. How much time does it take an electron to travel the length of the wire ? b. Find the electric field inside the wire. c. What is the resistance of this wire?

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