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Semiconductor Theory(Engineering > Electrical Engineering ) Questions and Answers
Home
Topic
Engineering
Electrical Engineering
Semiconductor Theory
Question 1.
The strength of a semiconductor crystal comes from
Forces between nuclei
Forces between protons
Electron-pair bonds
None of the above
Explanation:-
Answer: Option C. ->
Electron-pair bonds
Question 2.
The impurity level in an extrinsic semiconductor is about of pure semiconductor.
10 atoms for 108 atoms
1 atom for 108 atoms
1 atom for 104 atoms
1 atom for 100 atoms
Explanation:-
Answer: Option B. ->
1 atom for 108 atoms
Question 3.
A hole and electron in close proximity would tend to ___________
Repel each other
Attract each other
Have no effect on each other
None of the above
Explanation:-
Answer: Option B. ->
Attract each other
Question 4.
A semiconductor has generally ___________ valence electrons.
2
3
6
4
Explanation:-
Answer: Option D. ->
4
Question 5.
A pentavalent impurity has ___________ Valence electrons
3
5
4
6
Explanation:-
Answer: Option B. ->
5
Question 6.
A forward biased pn junction diode has a resistance of the order of
Ω
kΩ
MΩ
None of the above
Explanation:-
Answer: Option A. ->
Ω
Question 7.
A reverse biased pn junction has resistance of the order of
Ω
kΩ
MΩ
None of the above
Explanation:-
Answer: Option C. ->
MΩ
Question 8.
A semiconductor has ___________ temperature coefficient of resistance.
Positive
Zero
Negative
None of the above
Explanation:-
Answer: Option C. ->
Negative
Question 9.
At room temperature, an intrinsic semiconductor has ___________
Many holes only
A few free electrons and holes
Many free electrons only
No holes or free electrons
Explanation:-
Answer: Option B. ->
A few free electrons and holes
Question 10.
At absolute temperature, an intrinsic semiconductor has ___________
A few free electrons
Many holes
Many free electrons
No holes or free electrons
Explanation:-
Answer: Option D. ->
No holes or free electrons
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