Medium MCQ +4 / -1 PYQ · JEE Mains 2025

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) $\mathrm{n}_{\mathrm{e}} \mathrm{n}_{\mathrm{h}} \neq \mathrm{n}_i^2$

(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 :

  1. A (A), (B), (E) only Correct answer
  2. B (A), (C), (E) only
  3. C (A), (B), (C) only
  4. D (A), (C), (D) only

Solution

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

About this question

Subject: Physics · Chapter: Electronic Devices · Topic: Semiconductors

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