P27_069 - 69. (Third problem of Cluster) (a) We use Eq....

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69. (Third problem of Cluster ) (a) We use Eq. 27-17 with ρ = 10 8 ρ 0 (we are neglecting any thermal expansion of the material) and T T 0 = 100 K in order to obtain α =2 . 5 × 10 3 / K. Now with this value of α but T = 600 K (so T T 0 = 300 K) we Fnd ρ =1 . 75 ρ 0 R =1 . 75(8 . 0Ω)=14Ω. (b) We are assuming the wires have unknown but equal length (not the lengths shown in ±igure 27-33). With α D =5
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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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