What materials are commonly recognized as insulators?

Materials such as rubber, silk, wood, and glass are recognized as effective insulators due to their molecular structure, which does not allow electricity to flow freely through them. In the case of rubber, its high resistance to electrical conductivity makes it an excellent choice for insulating electrical cables. Similarly, silk has very low thermal and electrical conductivity, making it useful for insulation in various applications. Wood acts as a natural insulator, particularly when dry, due to its cellular structure that traps air, thus reducing conductivity. Glass, when in its solid form, has very little free movement of electrons, thereby preventing electrical flow.

These materials are essential in preventing electrical shock and ensuring safety in electrical systems and devices. Their insulating properties help protect both people and equipment from the hazards associated with electricity.