Oscillators(Electrical Engineering ) Questions and answers for exam Preparation

Question 1. In an LC oscillator, the frequency of oscillator is ___________ L or C.

Proportional to square of
Directly proportional to
Independent of the values of
Inversely proportional to square root of

Explanation:-

Answer: Option D. -> Inversely proportional to square root of

Question 2. Quartz crystal is most commonly used in crystal oscillators because ___________

It has superior electrical properties
It is easily available
It is quite inexpensive
None of the above

Explanation:-

Answer: Option A. -> It has superior electrical properties

Question 3. In a certain oscillator Av = 50. The attention of the feedback circuit must be ___________

1
1
10
2

Explanation:-

Answer: Option D. -> 2

Question 4. Hartley oscillator is commonly used in ___________

Radio receivers
Radio transmitters
TV receivers
None of the above

Explanation:-

Answer: Option A. -> Radio receivers

Question 5. The crystal oscillator frequency is very stable due to ___________ of the crystal

Rigidity
Vibrations
Low Q
High Q

Explanation:-

Answer: Option D. -> High Q

Question 6. An oscillator produces___________ oscillations

Damped
Undamped
Modulated
None of the above

Explanation:-

Answer: Option B. -> Undamped

Question 7. In a phase shift oscillator, we use ___________ RC sections

Two
Three
Four
None of the above

Explanation:-

Answer: Option B. -> Three

Question 8. The signal generator generally used in the laboratories is ___________ oscillator

Wien-bridge
Hartely
Crystal
Phase shift

Explanation:-

Answer: Option A. -> Wien-bridge

Question 9. An LC oscillator cannot be used to produce ___________ frequencies

High
Audio
Very low
Very high

Explanation:-

Answer: Option C. -> Very low

Question 10. An oscillator employs ___________ feedback

Positive
Negative
Neither positive nor negative
Data insufficient

Explanation:-

Answer: Option A. -> Positive