Copper and aluminum are being considered for a high-voltage transmission line that must carry a current of 43.1 A. The resistance per unit length is to be 0.136 /km. The densities of copper and aluminum are 8960 and 2600 kg/m3, respectively. Compute (a) the magnitude J of the current density and (b) the mass per unit length for a copper cable and (c) J and (d) A for an aluminum cable.

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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Copper and aluminum are being considered for a high-voltage transmission line that must carry a current of 43.1 A. The resistance
per unit length is to be 0.136 N/km. The densities of copper and aluminum are 8960 and 2600 kg/m³, respectively. Compute (a) the
magnitude J of the current density and (b) the mass per unit length A for a copper cable and (c) J and (d) A for an aluminum cable.
(a) Number
3.47E5
Units
(b) Number
Units
(c) Number
Units
(d) Number
Units
Transcribed Image Text:Copper and aluminum are being considered for a high-voltage transmission line that must carry a current of 43.1 A. The resistance per unit length is to be 0.136 N/km. The densities of copper and aluminum are 8960 and 2600 kg/m³, respectively. Compute (a) the magnitude J of the current density and (b) the mass per unit length A for a copper cable and (c) J and (d) A for an aluminum cable. (a) Number 3.47E5 Units (b) Number Units (c) Number Units (d) Number Units
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