P27_061 - 61. We use R/L = /A = 0.150 /km. (a) For copper J...

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61. We use R/L = ρ/A =0 . 150 Ω / km. (a) For copper J = i/A =( 6 0 . 0 A)(0 . 150 Ω / km) / (1 . 69 × 10 8 · m) = 5 . 32 × 10 5 A / m 2 ;andf o r aluminum J =(60 . 0 A)(0 . 150 Ω / km) / (2 . 75 × 10 8 · m) = 3 . 27 × 10 5 A / m 2 . (b) We denote the mass densities as ρ m . For copper ( m/L ) c =( ρ m A ) c = (8960 kg / m 3
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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