P27_025 - 25 The resistance at operating temperature T is R = V/i = 2.9 V/0.30 A = 9.67 Thus from R R0 = R0(T T0 we nd T = = 1 R 1 R0 1 20 C 4.5

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25. The resistance at operating temperature T is R = V/i =2 . 9V / 0 . 30 A = 9 . 67 Ω. Thus, from R R 0 = R 0 α ( T T 0 ), we Fnd T = T 0 + 1 α µ R R 0 1 =2 0 C+ µ 1 4 . 5 × 10 3 / K ¶µ 9 . 67 Ω 1 . 1Ω 1 which yields approximately 1900 C. Since a change in Celsius is equivalent to a change on the Kelvin
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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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