North Dakota Cosmetology Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

The composition of electric wires is fundamentally important to their function, as it directly relates to their ability to conduct electricity. The correct choice, which is typically copper and aluminum, emphasizes the materials that demonstrate excellent conductivity and efficiency in transmitting electrical current.

Copper is widely used because it has a high level of electrical conductivity, meaning it can carry more current than many other metals. It also possesses good malleability and ductility, allowing the wires to be easily shaped and drawn into fine strands without breaking. Aluminum, while not as conductive as copper, is lighter and more cost-effective, making it a popular alternative for certain applications, especially in high-voltage transmission lines where weight is a concern.

The other materials listed do not provide the necessary conductivity required for electric wires. While plastic and rubber are commonly found in electrical insulation to protect the wires and prevent short circuits, they do not conduct electricity. Twisted metal threads would not provide the consistent conductivity needed for effective electrical transfer. Similarly, silicone and fiber materials are not suitable for the conductive pathways that electric wires require. Instead, they might be used in applications requiring insulation or protection but not for the conduction of electricity itself. Thus, the primary components of electric wires, copper and aluminum, serve the essential role of