TABLE 26.2 Resistivities and Temperature Coefficients of Resistivity for Various Materials Temperature Coefficient a [(°C)-'] Material Resistivitya (N • m) Silver 1.59 X 10-8 3.8 × 10-3 1.7 × 10-8 3.9 X 10-3 Соpper Gold 2.44 X 10-8 3.4 X 10-3 Aluminum 2.82 × 10-8 3.9 X 10-3 Tungsten 5.6 X 10-8 4.5 X 10-3 Iron 10 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 1.00 X 10-6 3.5 X 10-5 Nichrome 0.4 X 10-3 Carbon -0.5 × 10-3 Germanium 0.46 -48 X 10-3 Silicond 2.3 × 103 1010 to 1014 -75 X 10-3 Glass Hard rubber 1013 Sulfur 1015 Quartz (fused) 75 X 1016 * All values at 20°C. All elements in this table are assumed to be free of impurities. b See Section 26.4. CA nickel-chromium alloy commonly used in heating elements. The resistivity of Nichrome varies with composition and ranges between 1.00 x 10-6 and 1.50 × 10-6N · 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.
TABLE 26.2 Resistivities and Temperature Coefficients of Resistivity for Various Materials Temperature Coefficient a [(°C)-'] Material Resistivitya (N • m) Silver 1.59 X 10-8 3.8 × 10-3 1.7 × 10-8 3.9 X 10-3 Соpper Gold 2.44 X 10-8 3.4 X 10-3 Aluminum 2.82 × 10-8 3.9 X 10-3 Tungsten 5.6 X 10-8 4.5 X 10-3 Iron 10 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 1.00 X 10-6 3.5 X 10-5 Nichrome 0.4 X 10-3 Carbon -0.5 × 10-3 Germanium 0.46 -48 X 10-3 Silicond 2.3 × 103 1010 to 1014 -75 X 10-3 Glass Hard rubber 1013 Sulfur 1015 Quartz (fused) 75 X 1016 * All values at 20°C. All elements in this table are assumed to be free of impurities. b See Section 26.4. CA nickel-chromium alloy commonly used in heating elements. The resistivity of Nichrome varies with composition and ranges between 1.00 x 10-6 and 1.50 × 10-6N · 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.
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A wire 50.0 m long and 2.00 mm in diameter is connected to a source with a potential difference of 9.11 V, and the current is found to be 36.0 A. Assume a temperature of 20.0°C and, using the given table, identify the metal out of which the wire is made.
![TABLE 26.2 Resistivities and Temperature Coefficients of Resistivity
for Various Materials
Temperature
Coefficient a [(°C)-']
Material
Resistivitya (N • m)
Silver
1.59 X 10-8
3.8 × 10-3
1.7 × 10-8
3.9 X 10-3
Соpper
Gold
2.44 X 10-8
3.4 X 10-3
Aluminum
2.82 × 10-8
3.9 X 10-3
Tungsten
5.6 X 10-8
4.5 X 10-3
Iron
10 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
1.00 X 10-6
3.5 X 10-5
Nichrome
0.4 X 10-3
Carbon
-0.5 × 10-3
Germanium
0.46
-48 X 10-3
Silicond
2.3 × 103
1010 to 1014
-75 X 10-3
Glass
Hard rubber
1013
Sulfur
1015
Quartz (fused)
75 X 1016
* All values at 20°C. All elements in this table are assumed to be free of impurities.
b See Section 26.4.
CA nickel-chromium alloy commonly used in heating elements. The resistivity of Nichrome
varies with composition and ranges between 1.00 x 10-6 and 1.50 × 10-6N · 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.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff81cd158-9f28-4b1f-ae17-04c733636b15%2F0ca53863-2670-4e54-82ba-cec3c6acf285%2Fufia3ny.png&w=3840&q=75)
Transcribed Image Text:TABLE 26.2 Resistivities and Temperature Coefficients of Resistivity
for Various Materials
Temperature
Coefficient a [(°C)-']
Material
Resistivitya (N • m)
Silver
1.59 X 10-8
3.8 × 10-3
1.7 × 10-8
3.9 X 10-3
Соpper
Gold
2.44 X 10-8
3.4 X 10-3
Aluminum
2.82 × 10-8
3.9 X 10-3
Tungsten
5.6 X 10-8
4.5 X 10-3
Iron
10 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
1.00 X 10-6
3.5 X 10-5
Nichrome
0.4 X 10-3
Carbon
-0.5 × 10-3
Germanium
0.46
-48 X 10-3
Silicond
2.3 × 103
1010 to 1014
-75 X 10-3
Glass
Hard rubber
1013
Sulfur
1015
Quartz (fused)
75 X 1016
* All values at 20°C. All elements in this table are assumed to be free of impurities.
b See Section 26.4.
CA nickel-chromium alloy commonly used in heating elements. The resistivity of Nichrome
varies with composition and ranges between 1.00 x 10-6 and 1.50 × 10-6N · 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.
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