NEETPhysicsSemiconductors
Match the List I with List II List I List II A Intrinsic Semiconductor I Fermi-level near valence band B n-type semiconductor II Fermi-level at middle of valence and conduction band C p-type semiconductor III Fermi-level near conduction band D Metals IV Fermi-level inside conduction band Choose the correct answer from the options given below:
Options
- A(A) → I, (B) → II, (C) → III, (D) → IV
- B(A) → II, (B) → I, (C) → III, (D) → IV
- C(A) → II, (B) → III, (C) → I, (D) → IV
- D(A) → III, (B) → I, (C) → II, (D) → IV
Correct answer
C. (A) → II, (B) → III, (C) → I, (D) → IV
Step-by-step solution
(A) The Fermi-level in an intrinsic semiconductor is nearly midway between the conductive and valence band.So, A → I I . (B) In the case of n-type semiconductor, the Fermi level is present just below the conduction band. So, B → I I I . (C) Fermi level in a p-type semiconductor lies close to the top of the valence band. So, C → I (D) In metals and semimetals the Fermi level lies inside at least one band i.e., inside conduction band. So, D → I V .