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Semiconductor Theory(Electrical Engineering ) Questions and Answers
Home
Topic
Electrical Engineering
Semiconductor Theory
Question 1.
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 2.
A reverse biased pn junction has resistance of the order of
Ω
kΩ
MΩ
None of the above
Explanation:-
Answer: Option C. ->
MΩ
Question 3.
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 4.
A semiconductor has ___________ temperature coefficient of resistance.
Positive
Zero
Negative
None of the above
Explanation:-
Answer: Option C. ->
Negative
Question 5.
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
Question 6.
A hole in a semiconductor is defined as ___________
A free electron
The incomplete part of an electron pair bond
A free proton
A free neutron
Explanation:-
Answer: Option B. ->
The incomplete part of an electron pair bond
Question 7.
The leakage current in a pn junction is of the order of
Aa
mA
kA
µA
Explanation:-
Answer: Option D. ->
µA
Question 8.
With forward bias to a pn junction , the width of depletion layer
Decreases
Increases
Remains the same
None of the above
Explanation:-
Answer: Option A. ->
Decreases
Question 9.
When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on
Junction capacitance
Minority carriers
Majority carriers
None of the above
Explanation:-
Answer: Option B. ->
Minority carriers
Question 10.
A semiconductor is formed by bonds.
Covalent
Electrovalent
Co-ordinate
None of the above
Explanation:-
Answer: Option A. ->
Covalent
1
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3
4
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