Which materials are considered good conductors?

Copper and aluminum are both considered good conductors due to their physical properties. Conductors are materials that allow the flow of electric current to pass through them with minimal resistance. This is primarily due to the presence of free electrons in their atomic structure, which can move easily when an electric field is applied.

Copper is widely used in electrical wiring because it has excellent conductivity, is relatively low in cost, and is highly durable. Aluminum, while less conductive than copper, is lightweight and also has good conductivity, which makes it a common choice for power transmission lines and various electrical components.

In contrast, materials such as glass, rubber, wood, and plastic are insulators. These materials have tightly bound electrons in their atomic structure, making it difficult for electric current to flow. Hence, they are used to prevent the flow of electricity in areas where it is not desired, ensuring safety and functionality in electrical applications.