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A certain wire has a resistivity of 2 x 10-8 Ohm*m at 20 degrees C. If...

A certain wire has a resistivity of 2 x 10-8 Ohm*m at 20 degrees C. If its length is 213 m and its cross-sectional area is 4 mm2, what will be its electric resistance at 68? (Assume that alpha = 0.005/deg C for this material)

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Answer #1

Temperature dependence resistance is R = Ro (9+& AT ) - (2 * 10-8 sem) *213m - 1.0652 (4*10-6m2) R = (1065x) [+0.005 /-c(68°C

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