# ECE - Questions and solutions set-11

Electronics and communication Engineering Questions and solutions set-11
Question:-
Option (A)
gold as an impurity below the contact
Option (B)
a high concentration of donors below the contact
Option (C)
a high concentration of acceptors below the contact
Option (D)
a thin insulator layer between the metal and a semiconductor.
Correct Option:
B
Question:-
Option (A)
symmetric matrix
Option (B)
skew-symmetric matrix
Option (C)
Hermitian matrix
Option (D)
skew-Hermitian matrix
Correct Option:
B
Question Solution:
A' = - A. Hence given matrix is a skew-symmetric matrix.
Question:-
Option (A)
0
Option (B)
1
Option (C)
ln 2
Option (D)
ln 4
Correct Option:
D
Question Solution:

Question:-
Option (A)
the conduction band on the p-side be lower than the valence band on the nside
Option (B)
the valence band on the n-side be higher than the valence band on the p-side
Option (C)
the conduction band on the n-side be higher than the valence band on the p-side
Option (D)
the conduction band on the n-side be lower than the valence band on the pside
Correct Option:
D