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JEE Main 20254 AprilEvening Shift
Exam
JEE Main
Year
2025
Date
4 April
Shift
Evening Shift
Subject
Physics
Chapter
Semiconductors

JEE Main 2025 · 4 April · Evening Shift · Physics · Semiconductors

Consider a n-type semiconductor in which n_ e and n_ h are number...

Consider a n-type semiconductor in which ne\mathrm{n}_{\mathrm{e}} and nh\mathrm{n}_{\mathrm{h}} are number of electrons and holes, respectively.
(A) Holes are minority carriers
(B) The dopant is a pentavalent atom
(C) nenh≠ni2\mathrm{n}_{\mathrm{e}} \mathrm{n}_{\mathrm{h}} \neq \mathrm{n}_{\mathrm{i}}^2
(where nin_i is number of electrons or holes in semiconductor when it is intrinsic form)
(D) nenh≥ni2\mathrm{n}_{\mathrm{e}} \mathrm{n}_{\mathrm{h}} \geq \mathrm{n}_{\mathrm{i}}^2
(E) The holes are not generated due to the donors Choose the correct answer from the options given below :

Options

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

Correct answer

C. (A), (B), (E) only

Step-by-step solution

(A) n type semiconductor holes are minority carriers and e−\mathrm{e}^{-}are majority carriers
(B) Dopant are pentavalent atom.
(C) ne⋅nh=ni2\mathrm{n}_{\mathrm{e}} \cdot \mathrm{n}_{\mathrm{h}}=\mathrm{n}_{\mathrm{i}}^2 for intrinsic semiconductor
(E) In nn type semiconductor primary source of holes generation are thermal excitation.
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