Why are electric wires coated with polyvinyl chloride or a rubber like material.

Q8. Why are electric wires coated with polyvinyl chloride or a rubber like material?
Ans. Polyvinyl chloride or rubbers are insulators. They do not allow electric current to pass through them so that even if we happened to touch the electric wires, the current should not pass through our body and hence we will not get electric shock.