Which material is classified as an insulator?

Rubber is classified as an insulator due to its molecular structure, which does not allow electrical currents to flow freely. Insulators are materials that resist the flow of electricity, making them ideal for use in electrical applications to prevent unintended current from passing through. Rubber is commonly used in electrical cords and safety equipment for this reason.

In contrast, materials like metals are good conductors of electricity because they have free electrons that can move easily through the structure, allowing for efficient current flow. While wood and glass can also demonstrate insulating properties under certain conditions, rubber is particularly recognized for its effectiveness in this role in various applications, especially in the field of cosmetology, where tools and devices need to be handled safely around electrical components.