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Electrical wires have a coating of an in...

 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

Text Solution

Verified by Experts

The correct Answer is:
C
PVC is a polymer and bad conductor of electricity. It is used as an insulating material for covering electric wires. Graphite is good conductor of electricity, so cannot be used as insulating material. Sulphur is a non-metal although non-conductor of electricity but brittle in nature. So, cannot be used as insulating material.
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