Q.1
If Ef>Efi, then what is the type of the semiconductor?
  • a) n-type
  • b) P-type
  • c) Elemental
  • d) Compound
Q.2
Is n/p=ni2 is a correct formula?
  • a) True
  • b) False
Q.3
Calculate the number of electrons is the number of holes are 15*1010?
  • a) 15*1010
  • b) 1.5*108
  • c) 1.5*109
  • d) 1.5*1010
Q.4
For which type of material, the number of free electron concentration is equal to the number of donor atoms?
  • a) P type semiconductor
  • b) Metal
  • c) N-type semiconductor
  • d) Insulator
Q.5
Identify the correct condition for a semiconductor to be electrically neutral.
  • a) Nd+p=Na+n
  • b) Nd-p=Na+n
  • c) Nd+p=Na-n
  • d) Nd-p=Na-n
Q.6
Do the Fermi energy level changes in a semiconductor?
  • a) True
  • b) False
Q.7
Consider a silicon wafer having Nc=2.8*1019cm-3 and the Fermi energy is .25eV below the conduction band. Calculate the equilibrium concentrations of electrons at T=300K?
  • a) 18*1016cm-3
  • b) 1.8*1016cm-3
  • c) 1.8*1014cm-3
  • d) 180*1016cm-3
Q.8
The 1-fF (E) increases in which of the following band for n type semiconductor?
  • a) Conduction band
  • b) Donor band
  • c) Acceptor band
  • d) Valence band
Q.9
The fF (E) decreases in which of the following band for p-type semiconductor?
  • a) Conduction band
  • b) Donor band
  • c) Acceptor band
  • d) Valence band
Q.10
Do the intrinsic Fermi energy level changes with the addition of dopants and acceptors?
  • a) True
  • b) False
0 h : 0 m : 1 s