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

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Solution

Option (c) is correct.

Polyvinyl chloride (PVC) is an insulator and is a polymer whereas graphite is a good conductor of electricity. If wire is coated with graphite then one cannot touch the wire. Sulphur is commercially not used as an insulating material and is toxic to handle.

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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

Option (c) is correct. Polyvinyl chloride (PVC) is an insulator and is a polymer whereas graphite is a good conductor of electricity. If wire is coated with graphite then one cannot touch the wire. Sulphur is commercially not used as an insulating material and is toxic to handle.

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

Option (c) is correct.

Polyvinyl chloride (PVC) is an insulator and is a polymer whereas graphite is a good conductor of electricity. If wire is coated with graphite then one cannot touch the wire. Sulphur is commercially not used as an insulating material and is toxic to handle.