Answered: A wire 3.00 m long and 0.450 mm2 in…

A wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 40.0 Q at 20.0°C. If its resistance increases to 40.8 Q at 28.0°C, what is the temperature coefficient of resistivity?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 14P

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Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

Question

A wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 40.0 2 at 20.0°C. If its resistance increases to 40.8 Q at
28.0°C, what is the temperature coefficient of resistivity?
(*C)-1
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