Final answer:
The correct option is b. False.The high-voltage wires on tall metal towers are not wrapped in insulating material; it is false that they are, as the air acts as the insulator while the wires are held aloft by insulating connectors.
Step-by-step explanation:
True or false: The high-voltage wires that you see connected to tall metal-frame towers are held aloft by insulating connectors, and these wires are wrapped in an insulating material. The correct answer is false. High-voltage transmission lines are typically not wrapped in insulating materials; rather, they are bare wires. They are held aloft by insulating connectors to prevent the current from traveling down the towers, which are conductive. The air around the wires acts as the insulator because it has a very high resistance to electrical current. Should the wires come into contact with anything conductive, such as trees or animals, the potential difference would allow electricity to flow through that object to the ground, potentially causing damage or injury.