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Electrical Engineering
Multistage Transistor Amplifiers
Quiz 1
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Q.1
The total gain of a multistage amplifier is less than the product of the gains of individual stages due to ___________
Power loss in the coupling device
Loading effect of the next stage
The use of many transistors
The use of many capacitors
Q.2
In practice, voltage gain is expressed ___________
In db
In volts
As a number
None of the above
Q.3
The upper or lower cut off frequency is also called ___________ frequency
Resonant
Sideband
3 db
None of the above
Q.4
The best frequency response is of ___________ coupling
RC
Transformer
Direct
None of the above
Q.5
The bandwidth of a single stage amplifier is ___________ that of a multistage amplifier
More than
The same as
Less than
Data insufficient
Q.6
Transformer coupling is generally employed when load resistance is
Large
Very large
Small
None of the above
Q.7
In RC coupling, the value of coupling capacitor is about ___________
10 µF
100 pF
0.1 µF
0.01 µF
Q.8
The ear is not sensitive to ___________
Frequency distortion
Amplitude distortion
Frequency as well as amplitude distortion
None of the above
Q.9
1 db corresponds to ___________ change in power level
50%
35%
26%
22%
Q.10
An amplifier receives 0.1 W of input signal and delivers 15 W of signal power. What is the power gain in db?
8 db
6 db
5 db
4 db
Q.11
An advantage of RC coupling scheme is the ___________
Good impedance matching
Economy
High efficiency
None of the above
Q.12
When a multistage amplifier is to amplify d.c. signal, then one must use coupling
RC
Transformer
Direct
None of the above
Q.13
1 db corresponds to ___________ change in voltage or current level
40%
80%
20%
25%
Q.14
In an RC coupled amplifier, the voltage gain over mid-frequency range ___________
Changes abruptly with frequency
Is constant
Changes uniformly with frequency
None of the above
Q.15
The purpose of RC or transformer coupling is to ___________
Block a.c.
Separate bias of one stage from another
Increase thermal stability
None of the above
Q.16
The frequency response of transformer coupling is ___________
Good
Very good
Excellent
Poor
Q.17
RC coupling is generally confined to low power applications because of
Large value of coupling capacitor
Low efficiency
Large number of components
None of the above
Q.18
___________ coupling provides the maximum voltage gain
RC
Transformer
Direct
Impedance
Q.19
The final stage of a multistage amplifier uses ___________
RC coupling
Transformer coupling
Direct coupling
Impedance coupling
Q.20
In obtaining the frequency response curve of an amplifier, the ___________
Amplifier level output is kept constant
Amplifier frequency is held constant
Generator frequency is held constant
Generator output level is held constant
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