Electrical wires have a coating of an insulated material. The material generally used is:

sulphur

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graphite

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PVC

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None of the above

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Solution

The correct option is C PVC
Insulators are the material which does not allow the flow of electric current. Therefore, insulators are used to coat electrical wires to avoid severe accidents.
PVC is an abbreviated form of polyvinyl chloride. The electrical characteristics of PVC such as electrical insulating properties or dielectric constant are excellent and hence, are used as insulating materials.
Graphite is a good conductor of electricity therefore it cannot be used for insulating electrical wires.
Sulphur also has insulating property but it cannot be used for insulating electrical wires because of its brittle nature.
So the correct option is C.

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Q. Electrical wires have a coating of an insulting material. The material generally used for insulation is :

Question 33
Electrical wires have a coating of an insulating material. The material, generally used is
(a) Sulphur
(b) Graphite
(c) PVC
(d) All can be used

Question 33
Electrical wires have a coating of an insulating material. The material, generally used is
(a) Sulphur
(b) Graphite
(c) PVC
(d) All can be used

The material used for coating on electric wires to avoid electric shock is __________.

Wires that carry current in our home have a coating of polyvinylchloride or a rubber like material why are electrical wires coated with such substsnces

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