The material used for insulators are

(A) Porcelain or toughened glass

(C) Silica

(D) Cement

(D) Clay 


Answer: (A) Porcelain or toughened glass


Explanation:

Insulators: Insulators are the materials which offer very high resistance to the flow of current

Insulators used for high-voltage power transmission are made from glass, porcelain or composite polymer materials

Porcelain insulators are made from clay, quartz or alumina and feldspar, and are covered with a smooth glaze to shed water

The surface of the insulator should be glazed enough so that water should not be traced on it and make current very negligible


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