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(A) In a pure semiconductor,also known as an intrinsic semiconductor,there are no impurity atoms present to provide charge carriers.At absolute zero t

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intrinsic

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(A) In a pure semiconductor,also known as an intrinsic semiconductor,there are no impurity atoms present to provide charge carriers.At absolute zero temperature,all valence electrons are involved in covalent bonds,and the semiconductor acts as an insulator.As the temperature increases,thermal energy causes some covalent bonds to break,creating electron-hole pairs.The conductivity of the semiconductor is then solely due to these thermally generated charge carriers resulting from the breaking of covalent bonds.Therefore,such a semiconductor is called an intrinsic semiconductor.

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

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