Coefficients de conductivité électrique
| Matériau | γ (S/m) |
| Argent | 6.8e+07 |
| Cuivre | 5.8e+07 |
| Or | 4.2e+07 |
| Aluminium | 3.8e+07 |
| Fer | 1e+07 |
| Platine | 9.4e+06 |
| Graphite | 100000 |
| Germanium | 1 |
| Silicium | 0.0004 |
| Verre | 1e-13 |
| PVC | 1e-14 |
| PE | 1e-16 |
| Silice | 1e-18 |
| Matériau | γ (S/m) |
| Argent | 6.8e+07 |
| Cuivre | 5.8e+07 |
| Or | 4.2e+07 |
| Aluminium | 3.8e+07 |
| Fer | 1e+07 |
| Platine | 9.4e+06 |
| Graphite | 100000 |
| Germanium | 1 |
| Silicium | 0.0004 |
| Verre | 1e-13 |
| PVC | 1e-14 |
| PE | 1e-16 |
| Silice | 1e-18 |