# Solution - Resistivity of Various Materials

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#### Question

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.

#### Solution

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A negligibly small current is passed through a wire of length 15 m and uniform cross-section 6.0 × 10−7m2, and its resistance is measured to be 5.0 Ω. What is the resistivity of the material at the temperature of the experiment?

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