Single Stage Transistor Amplifiers Mcqs
This set of Electrical engineering Multiple Choice Questions & Answers (MCQs) focuses on study of “Single Stage Transistor Amplifiers”. These questions are chosen from a collection of most authoritative and best reference books on Electrical engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Single Stage Transistor Amplifiers comprehensively.
17. In order to get more voltage gain from a transistor amplifier, the transistor used should have_________________?
Thin base
Thin collector
Wide emitter
None of the above
Answer & Solution
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18. In the d.c. equivalent circuit of a transistor amplifier, the capacitors are considered__________________?
Short
Open
Partially short
None of the above
19. 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
Answer & Solution
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20. The purpose of d.c. conditions in a transistor is to___________________?
Reverse bias the emitter
Forward bias the collector
Set up operating point
None of the above
Answer & Solution
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21. In the a.c. equivalent circuit of a transistor amplifier, the capacitors are considered ___________________?
Short
Open
Partially open
None of the above
22. 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
Answer & Solution
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23. The purpose of capacitors in a transistor amplifier is to___________________?
Protect the transistor
Cool the transistor
Couple or bypass a.c. component
Provide biasing
Answer & Solution
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24. In a CE amplifier, voltage gain =____________________ x RAC/Rin?
α
(1 + α)
(1+ β)
β
25. If the power and current gains of a transistor amplifier are 16500 and 100 respectively, then voltage gain is_____________________?
165
165 x 104
100
None of the above
26. In a CE amplifier, the phase difference between voltage across collector load RC and signal voltage is _________________?
180o
270o
90o
0o
27. 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
28. When a transistor amplifier is operating, the current in any branch is _______________?
Sum of a.c. and d.c.
A.C. only
DC. only
Difference of a.c. and d.c.
Answer & Solution
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29. The phase difference between the output and input voltages of a CE amplifier is _____________?
180o
0o
90o
270o
30. If the collector supply is 10V, then collector cut off voltage under d.c. conditions is _______________?
20 V
5 V
2 V
10 V