College Physics 10th Edition by Raymond Serway,Chris Vuille

تمرين 42

A 200-km-long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1 000 A. If the conductor is copper with a free charge density of 8.5 × 10 8 electrons per cubic meter, how many years does it take one electron to travel the full length of the cable