n-type semiconductor|Semiconductor Electronics|JEE-Main 2025

JEE MAIN 2025

04-04-2025 S2

Question

Consider a n-type semiconductor in which $n_e$ and $n_h$ are number of electrons and holes, respectively.
(A) Holes are minority carriers
(B) The dopant is a pentavalent atom
(C) $\mathrm{n}_{\mathrm{e}} \mathrm{n}_{\mathrm{h}} \neq \mathrm{n}_i^2$ (where n 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 :

Select the correct option:

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

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

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

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

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

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

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JEE Main

Physics

Medium

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