1. Find the drift velocity of electrons in a copper wire with a diameter of 130 mm if it carriesa current of 10 amperes.2. What should be the length and cross-sectional area of a wire for it to have a resistance of80 from a 5 - cm3 metal that has a resistivity of 9 x 10-8 - m.

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Answered: 1. Find the drift velocity of electrons…

1. Find the drift velocity of electrons in a copper wire with a diameter of 130 mm if it carries a current of 10 amperes.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter17: Current And Resistance

Section: Chapter Questions

Problem 58AP

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Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

Question

1. Find the drift velocity of electrons in a copper wire with a diameter of 130 mm if it carries
a current of 10 amperes.
2. What should be the length and cross-sectional area of a wire for it to have a resistance of
80 from a 5 - cm3 metal that has a resistivity of 9 x 10-8 - m.

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