Final answer:
The claim about high-voltage wires being wrapped in insulating material is false; they are held by insulators but are not wrapped due to the gap preventing arcing. Copper is malleable, ductile, and a good conductor of electricity, making it ideal for wiring. Dropping a bar magnet through a copper tube induces an electric current, which is a true statement.
Step-by-step explanation:
The statement about high-voltage wires is false. High-voltage wires connected to tall metal-frame towers, also known as transmission lines, are indeed held aloft by insulating connectors, but they are not typically wrapped in an insulating material. Instead, they are suspended in the air with a significant enough gap to prevent current from arcing through the air.
Materials like copper are chosen for wiring because they are malleable and ductile, allowing for easy installation as they can be bent and stretched without breaking. This makes copper a very good conductor of electricity, which is essential for efficient electrical power distribution.
Moreover, when a bar magnet is dropped through a copper tube, it does indeed induce an electric current in the tube, validating that the concept of electromagnetic induction applies here. This phenomenon is true due to Lenz's Law, demonstrating the interaction between magnetic fields and electrical conductors.