Oscillators Mcqs

This set of Electrical engineering Multiple Choice Questions & Answers (MCQs) focuses on study of “Oscillators”. 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 Oscillators Mcqs comprehensively.

2.
If the crystal frequency changes with temperature, we say that crystal has___________temperature coefficient?

Positive

Zero

Negative

None of the above

4.
In an LC transistor oscillator, the active device is___________?

LC tank circuit

Biasing circuit

Transistor

None of the above

5.
An oscillator employs___________feedback?

Positive

Negative

Neither positive nor negative

Data insufficient

7.
The application where one would most likely find a crystal oscillator is____________?

Radio receiver

Radio transmitter

AF sweep generator

None of the above

9.
____________is a fixed frequency oscillator?

Phase-shift oscillator

Hartely-oscillator

Colpitt’s oscillator

Crystal oscillator

10.
An important limitation of a crystal oscillator is____________?

Its low output

Its high Q

Less availability of quartz crystal

Its high output

12.
In a Wien-bridge oscillator, if the resistances in the positive feedback circuit are decreased, the frequency____________?

Remains the same

Decreases

Increases

Insufficient data

13.
A second condition for oscillations is____________?

A gain of 1 around the feedback loop

No gain around the feedback loop

The attention of the feedback circuit must be one-third

The feedback circuit must be capacitive

14.
An oscillator differs from an amplifier because it_____________?

Has more gain

Requires no input signal

Requires no d.c. supply

Always has the same input

15.
The piezoelectric effect in a crystal is___________?

A voltage developed because of mechanical stress

A change in resistance because of temperature

A change in frequency because of temperature

None of the above

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