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.

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16.
An amplifier has a power gain of 100. Its db gain is ________________?

10 db

20 db

40 db

None of the above

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

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

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

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

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

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.

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

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