Transistor Biasing Quiz | Transistor Biasing Multiple Choice Questions and Answers

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Questions
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

Answer: Also line
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

Answer: Middle
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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

Answer: Quiescent point
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

Answer: One thousandth
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

Answer: 10 IB
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

Answer: 50 µA
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

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

Answer: 3 mA
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

Answer: 1
10 An ideal value of stability factor is …………..
A 100
B 200
C More than 200
D 1

Answer: 1
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

Answer: Operating point
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

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

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

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

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

Answer: Biasing circuit
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

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

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

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

Answer: d.c.

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