|
Resistivities and Temperature Coefficients |
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|
Material Resistivity in ohm-meter Temperature coefficient at 20ºC (´ 10-8) 20ºC
(´
10-4) |
||||
|
Aluminum, commercial |
2.8 |
40.3 |
|
|
|
Brass |
6 – 8 |
20 |
|
|
|
Carbon |
3000 – 7000 |
-5 |
|
|
|
Constantan or Eureka |
49 |
+0.1 |
to |
-0.4 |
|
Copper (annealed) |
1.72 |
39.3 |
|
|
|
German Silver |
20.2 |
2.7 |
|
|
|
(84% Cu; 12% Ni; 4% Zn) |
|
|
|
|
|
Gold |
2.44 |
36.5 |
|
|
|
Iron |
9.8 |
65 |
|
|
|
Manganin |
44 – 48 |
0.15 |
|
|
|
(84% Cu ; 12% Mn ; 4% Ni) |
|
|
|
|
|
Mercury |
95.8 |
8.9 |
|
|
|
Nichrome |
108.5 |
1.5 |
|
|
|
(60% Cu ; 25% Fe ; 15% Cr) |
|
|
|
|
|
Nickel |
7.8 |
54 |
|
|
|
Platinum |
9 – 15.5 |
36.7 |
|
|
|
Silver |
1.64 |
38 |
|
|
|
Tungsten |
5.5 |
47 |
|
|
|
Amber |
5 ´ 1014 |
|
|
|
|
Bakelite |
1010 |
|
|
|
|
Glass |
1010 – 1012 |
|
|
|
|
Mica |
1015 |
|
|
|
|
Rubber |
1016 |
|
|
|
|
Shellac |
1014 |
|
|
|
|
Sulphur |
1015 |
|
|
|
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Resistivities and Temperature Coefficients
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