1. A current of 4 amperes flows through a wire 20 meters long and diameter of 0.5 centimeter. Howmany electrons pass through a given cross-sectional area of the said conductor in 2 milliseconds?Use 1.602 x 10-19 Coulomb per electron. 2. A certain conductor has a free electron density of 2 x 10 30 electrons per cubic feet. Its circular cross-sectional area is 150,000 square mils and 120 meters long. Its resistivity at 30 degrees Celsius is0.9 x 10-8 ohm-meter. If a current of 3 A passes thru this conductor, find the drift velocity in mm persecond.

This question is based on Current Electricity topic. Electric current formula: Formula based on…

1. A current of 4 amperes flows through a wire 20 meters long and diameter of 0.5 centimeter. How many electrons pass through a given cross-sectional area of the said conductor in 2 milliseconds? Use 1.602 x 10-19 Coulomb per electron.

1. A current of 4 amperes flows through a wire 20 meters long and diameter of 0.5 centimeter. How many electrons pass through a given cross-sectional area of the said conductor in 2 milliseconds? Use 1.602 x 10-19 Coulomb per electron.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 28PE: What current flows through a 2.54-cm-diameter rod of pure silicon that is 20.0 cm long, when 1,00 ...

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Question

1. A current of 4 amperes flows through a wire 20 meters long and diameter of 0.5 centimeter. How
many electrons pass through a given cross-sectional area of the said conductor in 2 milliseconds?
Use 1.602 x 10-19 Coulomb per electron.

2. A certain conductor has a free electron density of 2 x 10 30 electrons per cubic feet. Its circular cross-
sectional area is 150,000 square mils and 120 meters long. Its resistivity at 30 degrees Celsius is
0.9 x 10-8 ohm-meter. If a current of 3 A passes thru this conductor, find the drift velocity in mm per
second.

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