Electrical wires have a coating of an insulating material. The material, generally used is

(A) Sulphur

(B) Graphite


(D) All can be used



Metal wires usually have a coating of PVC .

PVC is a non-metal that provides protection against electrical current. 

PVC coated wires - Teachoo.png

So, the correct answer is (c) PVC

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo