Q3 of 71 Page 417

Let np and ne be the numbers of holes and conduction electrons in an intrinsic semiconductor.

Intrinsic semiconductor is pure semiconductor which belongs to the group fourth A of the periodic table. At room temperature (300°K), some covalent bonds break and equal number of electrons and holes (the place from where the electron vacated its place) are generated. Hence np=ne. So, the correct answer is option B.

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