| When the fencer is correctly earthed, all insulators and connections are correct and there is no vegetation growth on the wire. |
| Arctic and boreal mosses, for example, are effective insulators that minimize heat transfer from the soil surface to the underlying soil. |
| They lie in a grey area between conductors and insulators whose boundaries are somewhat unclear, and it is this ambiguity itself that is useful. |
| Unlike low-temperature superconductors, which are metals, high-temperature superconductors are insulators in their normal state. |
| We used these concepts to define conductors, insulators, and semiconductors, and showed one means of altering the conductivity of semiconductors. |
| Snow pack and other natural insulators can keep the frogs sufficiently warm during their winter hibernation. |
