Question 17: Semiconductors and Logic Gates

Question

Consider a n-type semiconductor in which $\mathrm{n}_{\mathrm{e}}$ and $\mathrm{n}_{\mathrm{h}}$ are number of electrons and holes, respectively.
(A) Holes are minority carriers
(B) The dopant is a pentavalent atom
(C) $\mathrm{n}_{\mathrm{e}} \mathrm{n}_{\mathrm{h}} 
eq \mathrm{n}_i^2$
(where $\mathrm{n}_i$ is number of electrons or holes in semiconductor when it is intrinsic form)
(D) $\mathrm{n}_{\mathrm{e}} \mathrm{n}_{\mathrm{h}} \geqslant \mathrm{n}_i^2$
(E) The holes are not generated due to the donors
Choose the correct answer from the options given below :

Accepted Answer

(A) n type semiconductor holes are minority carriers and $\mathrm{e}^{-}$are majority carriers
(B) Dopant are pentavalent atom.
(C) $\mathrm{n}_{\mathrm{e}} \cdot \mathrm{n}_{\mathrm{h}}=\mathrm{n}_{\mathrm{i}}^2$ for intrinsic semiconductor
(E) In $n$ type semiconductor primary source of holes generation are thermal excitation.

Answer

(A), (B), (E) only

Answer

(A), (C), (E) only

Answer

(A), (B), (C) only

Answer

(A), (C), (D) only

Semiconductors and Logic Gates

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