Download PDF
Free download in PDF Single Stage Transistor Amplifier Objective Type 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.
(21)
For highest power gain, one would use …………….. configuration
[A]
CC
[B]
CB
[C]
CE
[D]
none of the above
(22)
A transistor amplifier has high output impedance because ………..
[A]
Emitter is heavily doped
[B]
Collector has reverse bias
[C]
Collector is wider than emitter or base
[D]
None of the above
Answer: Collector has reverse bias
(23)
A transistor converts ……………
[A]
d.c. power into a.c. power
[B]
a.c. power into d.c. power
[C]
high resistance into low resistance
[D]
none of the above
Answer: d.c. power into a.c. power
(24)
The output power of a transistor amplifier is more than the input power because the additional power is supplied by …………
[A]
Transistor
[B]
Biasing circuit
[C]
Collector supply VCC
[D]
None of the above
Answer: Collector supply VCC
(25)
A single stage transistor amplifier with no load sees an a.c. load of ……..
[A]
RC + RE
[B]
RC
[C]
RC || RE
[D]
RC/RE
(26)
In transistor amplifiers, we generally use ………….. capacitors.
[A]
Electrolytic
[B]
Mica
[C]
Paper
[D]
Air
(27)
A single stage transistor amplifier with collector load RC and emitter resistance RE has a d.c. load of ……….
[A]
RC
[B]
RC || RE
[C]
RC – RE
[D]
RC + RE
(28)
The value of collector load RC in a transistor amplifier is ………… the output impedance of the transistor.
[A]
The same as
[B]
Less than
[C]
More than
[D]
None of the above
(29)
The d.c. load of a transistor amplifier is generally ………….. that of a a.c. load
[A]
The same as
[B]
Less than
[C]
More than
[D]
None of the above
(30)
A CE amplifier is also called ………….. circuit
[A]
Grounded emitter
[B]
Grounded base
[C]
Grounded collector
[D]
None of the above
31
The radio wave picked up by the receiving antenna is amplified about …….. times to have reasonable sound output
[A]
1000
[B]
A million
[C]
100
[D]
10000
32
If the input capacitor of a transistor amplifier is short-circuited, then………
[A]
Transistor will be destroyed
[B]
Biasing conditions will change
[C]
Signal will not reach the base
[D]
None of the above
Answer: Biasing conditions will change
33
If a transistor amplifier feeds a load of low resistance (e.g. speaker), then voltage gain will be ………….
[A]
High
[B]
Very high
[C]
Moderate
[D]
Low
34
The ratio of output impedance of a CE amplifier is ……………
[A]
About 1
[B]
Low
[C]
High
[D]
Moderate
35
The purpose of emitter capacitor (i.e. capacitor across RE) is to ……….
[A]
Avoid voltage gain drop
[B]
Forward bias the emitter
[C]
Reduce noise in the amplifier
[D]
None of the above
Answer: Avoid voltage gain drop
36
The purpose of a coupling capacitor in a transistor amplifier is to ……….
[A]
Increase the output impedance of transistor
[B]
Protect the transistor
[C]
Pass a.c. and block d.c.
[D]
Provide biasing
Answer: Pass a.c. and block d.c.
37
In order to get more voltage gain from a transistor amplifier, the transistor used should have …………..
[A]
Thin base
[B]
Thin collector
[C]
Wide emitter
[D]
None of the above
38
An amplifier has a power gain of 100. Its db gain is ……………
[A]
10 db
[B]
20 db
[C]
40 db
[D]
None of the above
39
The purpose of d.c. conditions in a transistor is to …………..
[A]
Reverse bias the emitter
[B]
Forward bias the collector
[C]
Set up operating point
[D]
None of the above
Answer: Set up operating point
Take Mock Tests