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Copper has 8.5∙1028 free electrons per cubic meter. A 71.0 cm length of 12-gauge copper wire...

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Electrical Engineering

Copper has 8.5∙1028 free electrons per cubicmeter. A 71.0 cm length of 12-gauge copper wire that is 2.05 mm indiameter carries 4.85 A of current. (a) How much time does it takefor an electron to travel the length of the wire? (b) Repeat part(a) for 6-gauge copper wire (diameter 4.12 mm) of the same lengththat carries the same current. (c) More generally, how doeschanging the diameter of the wire that carries a given amount ofcurrent affect the drift velocity of the electrons in thewire?    

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