Electrical insulators are materials characterized by their high resistance to the flow of electric current. This property arises because the electrons in these materials are tightly bound to the atoms and are not free to move readily under the influence of an electric field.
Which one of the following statements is correct with regard to the material of electrical insulators ?
Asked in UPSC NDA 1 2017 · Topic: Conductivity (Band Theory of Solids: Conductors, Semiconductors, and Insulators)
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