Number 12 copper wire (diameter 0.08080 inch) used for electrical installations in homes. What is the voltage drop in 50 m of #12 copper wire if it carries a current of 6.0 A? How many electrons pass through the copper wire per second (e = 1.6 x 10-19 C)? (The resistivity of copper is 1.7 x 10-8 2-m.) %3D

Number 12 copper wire (diameter 0.08080 inch) used for electrical installations in homes. What is the voltage drop in 50 m of #12 copper wire if it carries a current of 6.0 A? How many electrons pass through the copper wire per second (e = 1.6 x 10-19 C)? (The resistivity of copper is 1.7 x 10-8 2-m.) %3D

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 28P: An aluminum wire 1.628 mm in diameter (14-gauge) carries a current of 3.00 amps, (a) What is the...

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An aluminum wire 1.628 mm in diameter (14-gauge) carries a current of 3.00 amps, (a) What is the absolute value of the charge density in the wire? (b) What is the drift velocity of the electrons? (c) What would be the drift velocity if the same gauge copper were used instead of aluminum? The density of copper is 8.96 g/cm3 and thedensity of aluminum is 2.70 g/cm3. The molar mass ofaluminum is 26.98 g/mol and the molar mass of copper is 63.5 g/mol. Assume each atom of metal contributes one free electron.
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1. Consider a cylindrical wire that has conduction electron density 6.0 x 1028 and radius 0.5 mm. An electric field with strength 1 m3 7.5 x 10-4 creates a current of 4.8 × 10" electrons per second. a) What is the average drift speed for an electron? (include units) b) What is the average time in between electron collisions? fs (express your answer in femtoseconds)
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