Plastic cardboard, cloth and rubber are four substances that insulate wire.
plastic
Plastics and rubbers.
Cotton is the best material
A conductor carries electricity and is made of such a material that can conduct electrons. Like copper for instance which is the best or close to the best material for carring electrical currents...Insulators on the other hand prevent the passing of electrical currents: like plastic or rubber which are used to insulate wire,switches etc.
brass
any material can insulate magnetic field
plastic
Plastics and rubbers.
Copper is often used as a material for the wire itself, but I don't think you would ever use a metal to insulate a wire. Metals all conduct electricity, meaning using them as insulators for anything electrical would be a very bad idea. The most common material used to insulate electrical wires is PVC (polyvinyl chloride).
The insulation on a wire is applied after the wire is drawn to size.
Cover it with a nonconducting material.In the early days of electrical wiring materials like cotton cloth, natural rubber, and gutta percha were used.Now wires are almost always insulated with plastics (e.g. PVC, nylon, teflon).
Cotton is the best material
Styrofoam can insulate heat well, hence it is often used to store food.
copper
China is, or used to be (the current material may be some made made material) china on power lines. The separators were made of china to insulate them.
The coating on a wire is there to insulate it from contact with people, and other wires. The material will always be conducting. Good materials are rubber, plastics, glass. Metal would be the worst type of outer materials because it would conduct the electricity.
A conductor carries electricity and is made of such a material that can conduct electrons. Like copper for instance which is the best or close to the best material for carring electrical currents...Insulators on the other hand prevent the passing of electrical currents: like plastic or rubber which are used to insulate wire,switches etc.