WorksheetsELC2 UNIT1 QUIZ
Total questions: 57
Worksheet time: 57mins
Name
Class
Date
1.
How many layers or regions are there in Transistor?
a)
2
b)
3
c)
4
d)
1
2.
What will be the power consumption if power transistors are used?
a)
High
b)
Low
c)
Same
d)
Infinite
3.
Which terminal has the job of collecting or gathering the electrons or holes from the base?
a)
Emitter
b)
Cut off Region
c)
Collector
d)
Saturation point
4.
Which region is larger among the three region of a transistor
a)
Base
b)
Emitter
c)
Cut off
d)
Collector
5.
What will be in surplus in n-type?
a)
Electrons
b)
Holes
c)
Silicon
d)
Germanium
6.
Name the three terminals of a transistor
a)
Emitter, base and saturation
b)
Emitter, Base and Collector
c)
Saturation, cut off and active
d)
npn, pnp and diode configuration
7.
Name the three configuration of a transistor
a)
Emitter, Base and Collector
b)
npn, pnp and diode configuration
c)
Common Emitter, Common Base and Common Collector
d)
Emitter, base and saturation
8.
In every Transistor configuration, what is the state of emitter junction?
a)
Forward Biased
b)
Reverse Biased
c)
Saturation point
d)
cut off
9.
In every Transistor configuration, what is the state of collector junction?
a)
Forward Biased
b)
Reverse Biased
c)
Saturation point
d)
cut off
10.
Which is true for common base configuration in Transistor?
a)
Low current gain and high voltage gain
b)
Low voltage gain and high current gain
c)
current gain and voltage gain are same
d)
voltage gain is infinite
11.
Which is true for common collector configuration in Transistor?
a)
Low current gain and high voltage gain
b)
Low voltage gain and high current gain
c)
current gain and voltage gain are same
d)
voltage gain is infinite
12.
Why Common Emitter configuration is used in most amplifying circuit?
a)
Low current gain and high voltage gain
b)
High current gain and high voltage gain
c)
low current gain and low voltage gain
d)
Low voltage gain and high current gain
13.
Which Transistor configuration has the highest power gain?
a)
Common Emitter
b)
Common Base
c)
Common Collector
d)
None
14.
The process of adding power to the existing signal or wave without distorting the signal or wave shape is called?
a)
Sampling
b)
Electrification
c)
Amplification
d)
Current gain
15.
In common base configuration, which terminal is the output terminal?
a)
Emitter
b)
base
c)
collector
d)
saturation
16.
In common base configuration, which terminal is the input terminal?
a)
Emitter
b)
base
c)
collector
d)
saturation
17.
Which Transistor configuration is also known as Emitter Follower configuration?
a)
Common Emitter
b)
Common Base
c)
Common Collector
d)
None
18.
Which Transistor configuration has the highest output resistance?
a)
Common Emitter
b)
Common Base
c)
Common Collector
d)
None
19.
Which Transistor configuration has the highest input resistance?
a)
Common Emitter
b)
Common Base
c)
Common Collector
d)
None
20.
Which Transistor configuration has the lowest power gain?
a)
Common Emitter
b)
Common Base
c)
Common Collector
d)
None
21.
The bias condition for a transistor to be used as a linear amplifier is called_____________________
a)
forward-reverse
b)
forward-forward
c)
reverse-reverse
d)
collector-bias
22.
In a common emitter alpha is 0.9. The emitter current is 0.1mA. what is the value of IB current?
a)
5.3mA
b)
0.01mA
c)
180mA
d)
cannot be determined
23.
When operated in cutoff and saturation, the transistor acts like___________________
a)
a linear amplifier
b)
a switch
c)
a variable capacitor
d)
a variable resistor
24.
The operating point is also called as __________
a)
Cut off point
b)
Quiescent point
c)
Saturation point
d)
None of the above
25.
In saturation, Vce is________________
a)
0
b)
equal to Vcc
c)
5v
d)
maximum
26.
The voltage gain of transistor connected in __________arrangement is highest
a)
common base
b)
common emitter
c)
common collector
d)
none of the mentioned
27.
The approximate voltage across the forward-biased base-emitter junction of silicon BJT is_______________________
a)
0v
b)
0.7v
c)
0.3v
d)
VBB
28.
The value of α of a transistor is ___________
a)
more than 1
b)
less than 1
c)
1
d)
none of the mentioned
29.
The Beta(DC) for a given type of transistor_______________
a)
varies with temperature
b)
is a fixed constant
c)
varies from device to device
d)
answers A and C
30.
Ideally, a dc load line is a straight line drawn on the collector characteristics curves between_________________________
a)
The Q-point and cutoff
b)
The Q-point and Saturation
c)
Vce(cutoff) and Ic(sat)
d)
Ib=0 and Ib=Ic/Beta(DC)
31.
Voltage-divider bias______________________________
a)
cannot be independent of Beta(DC)
b)
can be essentially independent of Beta(DC)
c)
is not widely used
d)
requires fewer components than all the other methods
32.
The best used biasing method is ________________
a)
base bias
b)
emitter bias
c)
voltage divider bias
d)
none of the mentioned
33.
A transistor is a _______operated device
a)
Current
b)
Voltage
c)
Both a and b
d)
none of the mentioned
34.
The input impedance of the transistor is_________when compared to JFET
a)
less
b)
more
c)
equal
d)
none of the mentioned
35.
The most commonly used transistor connection is_________
a)
Common emitter
b)
Common Base
c)
Common Collector
d)
None
36.
If the value of Alpha is 0.9 then the value of β is___________
a)
9
b)
0.9
c)
900
d)
90
37.
The value of β for a transistor is generally ___________
a)
1
b)
less than 1
c)
Between 20 & 500
d)
Above 500
38.
If the base-emitter junction is open, the collector voltage is___________
a)
Vcc
b)
0V
c)
Floating
d)
0.2V
39.
The emitter current is always_____________________
a)
greater than the base current
b)
less than the collector current
c)
greater than the collector current
d)
Answers A and C
40.
Emitter bias requires
a)
only a positive supply voltage.
b)
only a negative supply voltage.
c)
no supply voltage
d)
both positive and negative supply voltages.
41.
For Emitter bias,the voltage at emitter is 0.7 less than the
a)
Emitter voltage
b)
collector voltage
c)
Base voltage
d)
ground voltage
42.
Main disadvantage of Emitter bias is that it requires
a)
one supply voltage
b)
Two supply voltage
c)
No supply voltage
d)
Three supply voltage
43.
The purpose of resistance in the emitter circuit of a transistor amplifier is to __________.
a)
Limit the maximum emitter current
b)
Provide base-emitter bias
c)
Limit the change in emitter current
d)
none of the mentioned
44.
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
45.
The disadvantage of voltage divider bias is that it has ………….
a)
High stability factor
b)
Low base current
c)
Many resistors
d)
none of the mentioned
46.
In voltage divider bias, VCC = 25 V; R1 = 10 kΩ; R2 = 2.2 kΩ ; RC = 3.6 V and RE =1 kΩ. What is the emitter voltage?
a)
6.7
b)
5.3
c)
4.9
d)
3.8
47.
In voltage divider bias, operating point is 3 V, 2 mA. If VCC = 9 V, RC = 2.2 kΩ, what is the value of RE ?
a)
2000 Ω
b)
1400 Ω
c)
800 Ω
d)
1600 Ω
48.
Which transistor bias circuit provides good Q-point stability with a single-polarity supply voltage?
a)
base bias
b)
collector feedback bias
c)
voltage divider bias
d)
emitter bias
49.
a transistor has how many regions of operation
a)
1
b)
2
c)
3
d)
4
50.
A transistor works in what region when worked as an Amplifier
a)
Saturation
b)
Active
c)
cut-off
d)
invert
51.
To keep transistor in saturation enough base current Ib must be
a)
stopped
b)
flowing
c)
both a and b
d)
none of the mentioned
52.
In the Cutoff State both Emitter Base Junction and Collector Base junctions are what biased
a)
forward
b)
no bias
c)
reverse
d)
none of the mentioned
53.
In saturation region bothEmitter Base and collectro base junctions are what biased
a)
reverse
b)
no bias
c)
zero bias
d)
forward
54.
Small signal amplifier called as___ amplifier
a)
Power
b)
Current
c)
Voltage
d)
None
55.
An electronic circuit having the capability to amplify power, voltage or current
a)
Rectifier
b)
Amplifier
c)
Clipper
d)
Mixer
56.
It is a signal that use only a small portion of the load line
a)
Small Signal
b)
Large Signal
c)
No Signal
d)
DC Signal
57.
Amplifiers designed to handle small AC signals such as the one being used in antenna and microphones
a)
Large Signal Amplifier
b)
Small Signal Mixer
c)
Large Signal Mixer
d)
Small Signal Amplifier
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