question_answer

At 0 K, intrinsic semiconductors behaves as

A)  a perfect conductor      

B)  a super conductor

C)  a semiconductor            

D)  a perfect insulator

Correct Answer: D

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.