Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Question
Chapter 26, Problem 45SP
To determine
The resistivity of aluminum wire at 100 °C.
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(a) A 35.5-m length of copper wire at 20.0°C has a radius of 0.31 mm. If a potential difference of 7.0 V is applied across the length of the wire, determine the current in the wire. (Use the values in the following table.)
Resistivities and Temperature Coefficients of Resistivity
for Various Materials (at 20°C)
Material
Resistivity
Temperature Coefficient
of Resistivity [(°C)-1]
(w. u)
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
150 x 10-8
0.4 x 10-3
Carbon
3.5 x 10-5
-0.5 x 10-3
Germanium
0.46
-48 x 10-3
Silicon
640
-75 x 10-3
Glass
1010-1014
Hard rubber
z1013
Sulfur
1015
Quartz (fused)
75 x 1016
A nickel-chromium alloy commonly used in heating elements.
A
(b) If the wire is heated to 34.0°C while the 7.0-V potential difference is maintained, what is the resulting current in the wire?
(a) A 35.5-m length of copper wire at 20.0°C has a radius of 0.31 mm. If a potential difference of 7.0 V is applied across the length of the wire, determine the current in the wire. (Use the values in the following table.)
Resistivities and Temperature Coefficients of Resistivity
for Various Materials (at 20°C)
Resistivity
(0 · m)
Material
Temperature Coefficient
of Resistivity [(°C)-1]
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
150 x 10-8
0.4 x 10-3
Carbon
3.5 x 10-5
-0.5 x 10-3
Germanium
0.46
-48 x 10-3
Silicon
640
-75 x 10-3
Glass
1010-1014
Hard rubber
1013
Sulfur
1015
Quartz (fused)
75 x 1016
aA nickel-chromium alloy commonly used in heating elements.
(b) If the wire is heated to 34.0°C while the 7.0-V potential difference is maintained, what is the resulting current in the wire?
A current of 1.97 A flows through an annealed copper wire 2.25 m long
and 1.47 mm in diameter.
Find the potential difference between the ends of the wire.
Annealed copper has a conductivity of 5.81 x 107 o-1m-1.
Answer Units: [V]
Chapter 26 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 26 - Prob. 20SPCh. 26 - 21. An electron gun in a TV set shoots out a beam...Ch. 26 - 22. What happens to the resistance of a copper...Ch. 26 - Prob. 23SPCh. 26 - Prob. 24SPCh. 26 - 25. What is the current through an 8.0-Ω toaster...Ch. 26 - 26. What potential difference is required to pass...Ch. 26 - 27. Determine the potential difference between the...Ch. 26 - Prob. 28SPCh. 26 - Prob. 29SP
Ch. 26 - 30. An electric utility company runs two 100 m...Ch. 26 - 31. When the insulation resistance between a motor...Ch. 26 - Prob. 32SPCh. 26 - Prob. 33SPCh. 26 - Prob. 34SPCh. 26 - Prob. 35SPCh. 26 - Prob. 36SPCh. 26 - Prob. 37SPCh. 26 - Prob. 38SPCh. 26 - 39. Find the potential difference between points-A...Ch. 26 - Prob. 40SPCh. 26 - 41. In Fig. 26-5, how large must R be if the...Ch. 26 - 26.42 [II] For the circuit of Fig. 26-6, find the...Ch. 26 - Prob. 43SPCh. 26 - Prob. 44SPCh. 26 - Prob. 45SPCh. 26 - Prob. 46SPCh. 26 - Prob. 47SPCh. 26 - Prob. 48SPCh. 26 - Prob. 49SP
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