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A coil of wire has a resistance of 34.2 Ω at 28.0 °C and 38.6 Ω...

A coil of wire has a resistance of 34.2 Ω at 28.0 °C and 38.6 Ω at 62.0 °C. What is the temperature coefficient of resistivity [(oC)-1]?

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Answer #1

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Rt = R t0 (1 + T)

= ((Rt / R t0 ) - 1) * (1/T)

T = 62 - 28 = 34

= ((38.6/34.2) -1) * (1/34)

= 0.003783969 K-1 = 3.784 * 10-3 (oC)-1

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