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Home
Semiconductor Devices Test - 90
Semiconductor Devices Test - 90
Result
Semiconductor Devices Test - 90
/
Score
-
Rank
Time Taken:
-
Question
1/10
4 / -1
In order to forward bias a PN junction, the negativeterminal of battery is connected to
Correct
Wrong
Skipped
A
P–side
Correct
Wrong
Skipped
B
Either P–side or N–side
Correct
Wrong
Skipped
C
N–side
Correct
Wrong
Skipped
D
None of these
Question
2/10
4 / -1
The diode shown in the circuit is a silicon diode. The potential difference between the points A and B will be
Correct
Wrong
Skipped
A
6 V
Correct
Wrong
Skipped
B
0.6 V
Correct
Wrong
Skipped
C
0.7 V
Correct
Wrong
Skipped
D
0 V
Question
3/10
4 / -1
Zener breakdown takes place if
Correct
Wrong
Skipped
A
Doped impurity is low
Correct
Wrong
Skipped
B
Doped impurity is high
Correct
Wrong
Skipped
C
Less impurity in N–part
Correct
Wrong
Skipped
D
Less impurity in P-type
Question
4/10
4 / -1
Consider the following statements A and B and identify the correct choice of the given answers (A) A zener diode is always connected in reverse bias (B) The potential barrier of a PN junction lies between 0.1 to 0.3 V approximately
Correct
Wrong
Skipped
A
A and B are correct
Correct
Wrong
Skipped
B
A and B are wrong
Correct
Wrong
Skipped
C
A is correct but B is wrong
Correct
Wrong
Skipped
D
A is wrong but B is correct
Question
5/10
4 / -1
The correct symbol for zener diode is
Correct
Wrong
Skipped
A
Correct
Wrong
Skipped
B
Correct
Wrong
Skipped
C
Correct
Wrong
Skipped
D
Question
6/10
4 / -1
No bias is applied to a P — N junction, then the current
Correct
Wrong
Skipped
A
Is zero because the number of charge carriers flowing on both sides is same
Correct
Wrong
Skipped
B
Is zero because the charge carriers do not move
Correct
Wrong
Skipped
C
Is non-zero
Correct
Wrong
Skipped
D
None of the above
Question
7/10
4 / -1
Zener diode is used as
Correct
Wrong
Skipped
A
Half wave rectifier
Correct
Wrong
Skipped
B
Full wave rectifier
Correct
Wrong
Skipped
C
Ac voltage stabilizer
Correct
Wrong
Skipped
D
Dc voltage stabilizer
Question
8/10
4 / -1
The width of forbidden gap in silicon crystal is 1.1 eV. When the crystal is converted into a N–type semiconductor the distance of Fermi level from conduction band is
Correct
Wrong
Skipped
A
Greater than 0.55 eV
Correct
Wrong
Skipped
B
Equal to 0.55 eV
Correct
Wrong
Skipped
C
Lesser than 0.55 eV
Correct
Wrong
Skipped
D
Equal to 1.1 eV
Question
9/10
4 / -1
In P – N junction, the barrier potential offers resistance to
Correct
Wrong
Skipped
A
Free electrons in N region and holes in P region
Correct
Wrong
Skipped
B
Free electrons in P region and holes in N region
Correct
Wrong
Skipped
C
Only free electrons in N region
Correct
Wrong
Skipped
D
Only holes in P region
Question
10/10
4 / -1
Symbolic representation of photodiode is
Correct
Wrong
Skipped
A
Correct
Wrong
Skipped
B
Correct
Wrong
Skipped
C
Correct
Wrong
Skipped
D
Re-attempt
-
Correct (
-
)
Wrong (
-
)
Skipped (
-
)
1
2
3
4
5
6
7
8
9
10
Re-attempt
-
Correct (
-
)
Wrong (
-
)
Skipped (
-
)
1
2
3
4
5
6
7
8
9
10
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