When the conductivity of a semiconductor is only due to breaking of the covalent bonds, the semiconductor is calleda)donorb)acceptorc)intrinsicd)extrinsicCorrect answer is option 'C'. Can you explain this answer?

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When the conductivity of a semiconductor is only due to breaking of the covalent bonds, the semiconductor is called

a)
donor
b)
acceptor
c)
intrinsic
d)
extrinsic

Correct answer is option 'C'. Can you explain this answer?

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When the conductivity of a semiconductor is only due to breaking of th...

Explanation:A pure semiconductor is called intrinsic semiconductor, e.g., silicon, germanium. The presence of the mobile charge carriers is the intrinsic property of the material. At room temperature, some covalent bonds are broken and electrons are made free. The absence of electron in the covalent bond form hole.The electrical conduction is by means of mobile electrons and holes. Hole act as positive charge, because it can attract an electron. If some other bond is broken and the electron thus freed fills this hole(vacancy), it seems as though the hole is moving.Actually an electron is travelling in opposite direction. In a pure(intrinsic) semiconductor, the number of holes is equal to the number of free electrons.

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