# 3.7 A silver wire has a resistance of 2.1 Ω at 27.5 °C, and a resistance of 2.7 Ω at 100 °C. Determine the temperature coefficient of resistivity of silver.

Given,

;

;

We know,

2.7 = 2.1[1 +  (100 -  27.5) ]

= (2.7 - 2.1) / 2.1(100 -27.5)

= 0.0039

Hence, Temperature Coefficient of silver wire is 0.0039

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