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Solution


Q.

Which insulating material is used for coating the electrical wires
1 Lead  
2 Graphite  
3 PVC  
4 All of the above  

Ans.

(3)

The electrical characteristics such as electrical insulating properties or dielectric constant of PVC (polyvinyl chloride) are high due to which it is used as an insulating material. To prevent any accidental contact with other conductors, the metallic part of an electrical wire are covered with PVC.