Macmillan Learning Two insulated copper wires of similar overall diameter have very different interiors. One wire possesses a solid core of copper, with a circular cross section of radius 3.03 mm. The other wire is composed of 19 strands of thin copper wire bundled together. Each strand has a circular cross section of radius 0.606 mm. The current density J in each wire is the same. J = 1350 A/m² How much current does each wire carry? solid wire current: A solid wire resistance: The resistivity of copper is p = 1.69 × 10-8 22.m. What is the resistance of a 1.75 m length of each wire? stranded wire current: Ω stranded wire resistance: A Ω

Macmillan Learning Two insulated copper wires of similar overall diameter have very different interiors. One wire possesses a solid core of copper, with a circular cross section of radius 3.03 mm. The other wire is composed of 19 strands of thin copper wire bundled together. Each strand has a circular cross section of radius 0.606 mm. The current density J in each wire is the same. J = 1350 A/m² How much current does each wire carry? solid wire current: A solid wire resistance: The resistivity of copper is p = 1.69 × 10-8 22.m. What is the resistance of a 1.75 m length of each wire? stranded wire current: Ω stranded wire resistance: A Ω

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 68PQ

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