Oklahoma Locksmith Practice Exam

Which of the following materials is considered a good electrical conductor?

1. Rubber

2. Plastic

3. Copper

4. Wood

The correct answer is: Copper

Copper is widely recognized as an excellent electrical conductor due to its high electrical conductivity, which allows electric current to flow through it with minimal resistance. It has a unique atomic structure that enables the easy movement of electrons, making it ideal for use in electrical wiring, components, and various electronic devices. This outstanding conductive property is a significant reason copper is commonly used in electrical installations and appliances. In contrast, materials such as rubber, plastic, and wood are typically classified as insulators. These materials do not allow electrical current to pass through them easily, making them unsuitable for conducting electricity. Therefore, among the choices provided, copper distinctly stands out as the material with effective electrical conducting properties.