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  4. At 0 K, intrinsic semiconductors behaves as

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Q. At $0 \,K$, intrinsic semiconductors behaves as

Chhattisgarh PMTChhattisgarh PMT 2004

Solution:

Semiconductors $ (Ge) $ has four valence electrons. At $0 \,K$ all atoms of $ Ge $ forms covalent bonds with the four valence electrons around it, due to this sharing of electrons the atom achieves a stable configuration. Thus, no electrons is free for conduction. Hence conduction of electricity is not possible through semiconductors and it behaves as a perfect insulator.

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