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Electrical Engineering
Single Stage Transistor Amplifiers
Quiz 3
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Q.1
If the input capacitor of a transistor amplifier is short-circuited, then
Transistor will be destroyed
Biasing conditions will change
Signal will not reach the base
None of the above
Q.2
The purpose of a coupling capacitor in a transistor amplifier is to ___________
Increase the output impedance of transistor
Protect the transistor
Pass a.c. and block d.c.
Provide biasing
Q.3
The purpose of emitter capacitor (i.e. capacitor across RE) is to ___________
Avoid voltage gain drop
Forward bias the emitter
Reduce noise in the amplifier
None of the above
Q.4
A single stage transistor amplifier with no load sees an a.c. load of
RC + RE
RC
RC || RE
RC/RE
Q.5
The value of collector load RC in a transistor amplifier is ___________ the output impedance of the transistor.
The same as
Less than
More than
None of the above
Q.6
If a transistor amplifier draws 2mA when input voltage isV, then its input impedance is ___________
20 kΩ
2 kΩ
10 kΩ
5 kΩ
Q.7
CC configuration is used for impedance matching because its ___________
Input impedance is very high
Input impedance is low
Output impedance is very low
None of the above
Q.8
The slope of a.c. load line is ___________ that of d.c. load line
The same as
More than
Less than
None of the above
Q.9
A single stage transistor amplifier contains ___________ and associated circuitry
Two transistors
One transistor
Three transistor
None of the above
Q.10
In a CE amplifier, voltage gain = ___________ x RAC/Rin
α
(1 + α)
(1+ β)
β
Q.11
In transistor amplifiers, we generally use ___________ capacitors.
Electrolytic
Mica
Paper
Air
Q.12
It is generally desired that a transistor should have ___________ input impedance
Low
Very low
High
Very high
Q.13
If RC and RL represent the collector resistance and load resistance respectively in a single stage transistor amplifier, then a.c. load is
RL + RC
RC || RL
RL - RC
RC
Q.14
If a transistor amplifier feeds a load of low resistance (e.g. speaker), then voltage gain will be ___________
High
Very high
Moderate
Low
Q.15
The d.c. load of a transistor amplifier is generally ___________ that of a a.c. load
The same as
Less than
More than
None of the above
Q.16
In a single stage transistor amplifier, RC and RL represent collector resistance and load resistance respectively. The transistor sees a d.c. load of ___________
RC + RL
RC || RL
RL
RC
Q.17
A single stage transistor amplifier with collector load RC and emitter resistance RE has a d.c. load of ___________
RC
RC || RE
RC - RE
RC + RE
Q.18
A CE amplifier is also called ___________ circuit
Grounded emitter
Grounded base
Grounded collector
None of the above
Q.19
If the power and current gains of a transistor amplifier areandrespectively, then voltage gain is
165
165 x 104
100
None of the above
Q.20
The output power of a transistor amplifier is more than the input power because the additional power is supplied by ___________
Transistor
Biasing circuit
Collector supply VCC
None of the above
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