A 100km long high voltage transmission line that uses an unknown material has a diameter of 3 cm and a potential difference of 220V is maintained across the ends. The average time between collision is 2.7 x 10-14 s and the free-electron density is 8.5 x 1026 /m³. d. Determine the resistivity of the unknown material in micro-ohmmeter. e. Determine the time taken by the electrons to travel the full length of the cable in mega- seconds.

A 100km long high voltage transmission line that uses an unknown material has a diameter of 3 cm and a potential difference of 220V is maintained across the ends. The average time between collision is 2.7 x 10-14 s and the free-electron density is 8.5 x 1026 /m³. d. Determine the resistivity of the unknown material in micro-ohmmeter. e. Determine the time taken by the electrons to travel the full length of the cable in mega- seconds.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 62PQ

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