Question

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1. Name five materials which are good conductors of

electricity
2. From our surroundings, list five insulators.
3. Why are wires covered with plastic sheaths?
4. Write one use of insulators.
5. Can an electric current flow through the human
body? Why?​

Answer 1

Answer:

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Answer 2

Answer:

1.Copper, Silver, Aluminum, Gold, Steel and Brass are common conductors of electricity. While silver and gold are both effective, they are too expensive for common use.

2.Oil,Air ,pure water, Dry wood, Glass

3.Most electrical wire is covered in a rubber or plastic coating called insulation. ... The purpose of insulation covering the metal part of an electrical wire is to prevent accidental contact with other conductors of electricity, which might result in an unintentional electric current through those other conductors.

4.Thermal insulators, sound insulators and electrical insulators are used for various reasons, from keeping houses warm to protecting electrical wires and soundproofing rooms.

5.The human body is a good conductor of electric current simply because it is 70% water. Human tissue is very sensitive to the flow of electric current and is more susceptible to electric shock when wet. How much current flows through a person's body can be estimated using ohms law (I = E/R).

Explanation:

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