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Free download in PDF Transistor Biasing Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
1
The operating point ………………… on the a.c. load line
A
Also line
B
Does not lie
C
May or may not lie
D
Data insufficient
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2
For proper amplification by a transistor circuit, the operating point should be located at the ………….. of the d.c. load line
A
The end point
B
Middle
C
The maximum current point
D
None of the above
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3
The operating point is also called the ………….
A
Cut off point
B
Quiescent point
C
Saturation point
D
None of the above
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4
The leakage current in a silicon transistor is about ………… the leakage current in a germanium transistor
A
One hundredth
B
One tenth
C
One thousandth
D
One millionth
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5
For good stabilsation in voltage divider bias, the current I1 flowing through R1 and R2 should be equal to or greater than
A
10 IB
B
3 IB
C
2 IB
D
4 IB
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6
The biasing circuit has a stability factor of 50. If due to temperature change, ICBO changes by 1 µA, then IC will change by …………
A
100 µA
B
25 µA
C
20 µA
D
50 µA
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7
The disadvantage of base resistor method of transistor biasing is that it …………
A
Is complicated
B
Is sensitive to changes in ß
C
Provides high stability
D
None of the above
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Answer: Is sensitive to changes in ß
8
If the maximum collector current due to signal alone is 3 mA, then zero signal collector current should be at least equal to ………..
A
6 mA
B
mA
C
3 mA
D
1 mA
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9
The zero signal IC is generally ……………… mA in the initial stages of a transistor amplifier
A
4
B
1
C
3
D
More than 10
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10
An ideal value of stability factor is …………..
A
100
B
200
C
More than 200
D
1
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11
The point of intersection of d.c. and a.c. load lines represents …………..
A
Operating point
B
Current gain
C
Voltage gain
D
None of the above
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12
The circuit that provides the best stabilization of operating point is …………
A
Base resistor bias
B
Collector feedback bias
C
Potential divider bias
D
None of the above
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Answer: Potential divider bias
13
For faithful amplification by a transistor circuit, the value of VCE should ……….. for silicon transistor
A
Not fall below 1 V
B
Be zero
C
Be 0.2 V
D
None of the above
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Answer: Not fall below 1 V
14
For proper operation of the transistor, its collector should have …………
A
Proper forward bias
B
Proper reverse bias
C
Very small size
D
None of the above
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Answer: Proper reverse bias
15
For faithful amplification by a transistor circuit, the value of VBE should ………. for a silicon transistor
A
Be zero
B
Be 0.01 V
C
Not fall below 0.7 V
D
Be between 0 V and 0.1 V
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Answer: Not fall below 0.7 V
16
Transistor biasing is generally provided by a …………….
A
Biasing circuit
B
Bias battery
C
Diode
D
None of the above
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17
If biasing is not done in an amplifier circuit, it results in ……………
A
Decrease in the base current
B
Unfaithful amplification
C
Excessive collector bias
D
None of the above
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Answer: Unfaithful amplification
18
Operating point represents …………..
A
Values of IC and VCE when signal is applied
B
The magnitude of signal
C
Zero signal values of IC and VCE
D
None of the above
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Answer: Zero signal values of IC and VCE
19
Transistor biasing is done to keep ………… in the circuit
A
Proper direct current
B
Proper alternating current
C
The base current small
D
Collector current small
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Answer: Proper direct current
20
Transistor biasing represents ……………. conditions
A
a.c.
B
d.c.
C
both a.c. and d.c.
D
none of the above
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