Question

1. Give reasons : (a) Why electrical wires are coated with PVC (Poly Vinyl Chloride) ? (b) Why do we apply oil on iron tools kept in storage ?

Answer 1

a) to provide insulation during the flow of current

b) So that the do not rust by coming in contact with atmospheric moisture and oxygen

Answer 2

electric wires are clotted with Pvc because Pvc is insulator and wires of copper are conductor.so, Pvc help us to protect from electric current.
we apply oil because of that iron cannot be rust.