Question

Give reason. Electrical wires are coated with PVC or a rubber like material.

Answer 1

Here, electrodes (two suitable conducting materials) are kept in electrolyte (liquid or semi solid paste like material). These two chemically react with each other and the result is the accumulation of charged particles at the surface of electrodes. When this charged particles get a way to travel, the negative charged particles move towards positive ions thus producing what we conventionally call Electric current. This path for electrons is called conductor (or the wire as mentioned in question). And we harness the motion of this electrons by placing our equipment (like a light bulb) in between this path. A representational image is shown below.

Answer 2

electrical wires are coated with pvc or rubber like material as they play the role of plastics and act as a insulator