Answered: A 35.1-m length of copper wire at…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A 35.1-m length of copper wire at 20.0°C has a radius of 0.29 mm. If a potential difference of 8.00 V is applied across the length of the wire, determine the current in the wire. (Use the values in the following table.) (a) All values at 20°C. All elements in this table are assumed to be free of impurities. (b) See the section "Resistance and Temperature". (c) A nickel–chromium alloy commonly used in heating elements. The resistivity of Nichrome varies with composition and ranges between 1.00 ✕ 10−6 and 1.50 ✕ 10−6 Ω · m. (d) The resistivity of silicon is very sensitive to purity. The value can be changed by several orders of magnitude when it is doped with other atoms. A (b) If the wire is heated to 40.0°C while the 8.00-V potential difference is maintained, what is the resulting current in the wire? A

Resistivity (0 · m) Temperature Coefficient of Resistivityb a [(°C)-1]
Material
Silver
1.59 x 10-8
3.8 x 10-3
Copper
1.7 x 10-8
3.9 x 10-3
Gold
2.44 x 10-8
3.4 x 10-3
Aluminum
2.82 x 10-8
3.9 x 10-3
Tungsten
5.6 x 10-8
4.5 x 10-3
Iron
10.0 x 10-8
5.0 x 10-3
Platinum
11 x 10-8
3.92 x 10-3
Lead
22 x 10-8
3.9 x 10-3
Nichrome
1.00 x 10-6
0.4 x 10-3
Carbon
3.5 x 10-5
-0.5 x 10-3
Germanium
0.46
-48 x 10-3
Silicond
2.3 x 103
-75 x 10-3
Glass
1010-1014
Hard rubber
=1013
Sulfur
1015
Quartz (fused)
75 x 1016

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