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Asked Dec 19, 2019
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A wire 3.00 m long and 0.450 mm2 in cross - sectional area
has a resistance of 41.0 Ω at 20.0°C. If its resistance increases
to 41.4 Ω at 29.0°C, what is the temperature coefficient of
resistivity?

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Given Info: The wire has length 3.00 m and cross sectional area 0.450 mm2 , the wire has resistance 41.0 N at 20.0 °C and 41.4 N at 29.0 °C. Explanation: Formula to calculate the temperature coefficient of resistance is R-Ro Ro(T–To) Ris the resistance at some temperature T, Ro is the resistance at some reference temperature To, a is the temperature coefficient of resistivity of wire,

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