A High-Voltage Transmission Line of Diameter 2 Cm and Length

Multiple Choice

A high-voltage transmission line of diameter 2 cm and length 150 km carries a steady current of 1 000 A.If the conductor is copper with a free charge density of 8 × 10²⁸ electrons/m³,how long does it take one electron to travel the full length of the cable? (e = 1.6 × 10−¹⁹ C)

A) 6.0 × 10² s
B) 6.0 × 10⁴ s
C) 6.0 × 10⁶ s
D) 6.0 × 10⁸ s
E) 6.0 × 10^-10 s