Electricity > Electrical Resistivity
The following table shows the typical electrical resistivity of common materials. Electrical resistivity is a measure of how strongly a material opposes an electrical current. The SI unit of resistivity is the Ohm Metre (Ωm).
| Material |
Resistivity (Ωm) at 20 °C |
Temperature coefficient [K −1] |
| Silver |
1.59 ×10-8 |
0.0038 |
| Copper |
1.68 ×10-8 |
0.0039 |
| Gold |
2.44 ×10-8 |
0.0034 |
| Aluminium |
2.82 ×10-8 |
0.0039 |
| Calcium |
3.36x10-8 |
/ |
| Tungsten |
5.60 ×10-8 |
0.0045 |
| Zinc |
5.90 ×10-8 |
0.0037 |
| Nickel |
6.99 ×10-8 |
0.006 |
| Iron |
1.0 ×10-7 |
0.005 |
| Platinum |
1.06 ×10-7 |
0.00392 |
| Tin |
1.09 ×10-7 |
0.0045 |
| Lead |
2.2 ×10-7 |
0.0039 |
| Manganin |
4.82 ×10-7 |
0.000002 |
| Constantan |
4.9 ×10-7 |
0.000008 |
| Mercury |
9.8 ×10-7 |
0.0009 |
| Nichrome |
1.10 ×10-6 |
0.0004 |
| Carbon |
3.5 ×10-5 |
−0.0005 |
| Germanium |
4.6 ×10-1 |
−0.048 |
| Silicon |
6.40 ×102 |
−0.075 |
| Glass |
1010 to 1014 |
/ |
| Hard rubber |
approx. 1013 |
/ |
| Sulfur |
1015 |
/ |
| Paraffin |
1017 |
/ |
| Quartz (fused) |
7.5 ×1017 |
/ |
| PET |
1020 |
/ |
| Teflon |
1022 to 1024 |
/ |