Question

Electrical wires and parts of electrical appliances are covered with __________. *
A) Aluminium
B) Plastic
C) Copper

Answer 1

B Plastic

Electrical appliances are covered with plastic as it is an insulator

Answer 2

Electrical wires and parts of electrical appliances are covered with plastic (option B)

• Plastic is used to surround most of the electrical appliances including wires.
• It is an electrical insulator. It does not conduct electricity as it does not possess enough number of free electrons that can move to form a current.
• Using an electrical conductor to cover wires may risk safety. Short circuits might take place or building heat might cause fire. Therefore, an insulator should be used to cover electrical appliances.
• The only drawback of using plastic is that it has a very low melting point. If the wire starts to heat up after long hours of electricity supply, the heat produced can gradually melt the plastic around the wire.