A 12 gauge gold wire carries a current of 150 A If each gold

A 12 gauge gold wire carries a current of 15.0 A. If each gold atom contributes one electron for conduction what is the drift velocity of the charge? How long does it take each carrier in this wire to travel 100.0 m? A copper wire has radius r = 0.025 cm, is 3.0 m long has resistivity rho = 1.72 times 10^-8 ohm-m, and carries a current of 0.4 A. The wire has a charge- carrier density of 8.50 times 10^28 electrons/m^3. What is the resistance of the wire? What is the electric potential AV across the wire? What is the electric field in the wire What is the drift velocity of the charge carrier?

Solution

number density for gold is n = 5.90 x 10²⁸ m^-3

the drift velocity is,

     v_d = i/n*e*A = 15 / [ 5.90 x 10²⁸ ][1.6x10^-19][A]

Here, area A of the gold wire is missing.

The time t is calculated as follows:

         t = v_d*m/(q*E)

here, electric field E = V/d= IR/d

Note: relavent data is missing. use the above formulas we get the correct answers.