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

question 33

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

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