Answer / Dhirendra Kumar Rathore

Materials are classified as conductors, semiconductors, or dielectrics based on their electrical conductivity. Conductors have high conductivities and allow electric current to flow easily, while dielectrics are poor conductors that block the flow of electric current. Semiconductors fall between these two categories with intermediate properties. The conductivity (σ) of a perfect dielectric is zero because it does not conduct electricity under normal conditions.

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