Analog Circuits Questions and Answers – Classification of Oscillator-1

This set of Analog Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Classification of Oscillator-1”.

1. Frequency of oscillation of alternator is ___________
a) 100Hz
b) 50Hz
c) 1KHz
d) 200Hz

Explanation: Alternator frequency depends upon the speed of rotation and the number of pairs of rotor poles. When connected to a power system, alternators are synchronized with the grid frequencies which is either 50/60Hz depending on the geographical location.

2. Oscillation can be classified as damped and sustained on the basis of varying.
a) Input power
b) Frequency
c) Amplitude
d) Noise margin

Explanation: Oscillation can be classified as damped and sustained on the basis of varying amplitude.

3. Damped oscillations are those oscillations which ___________ continuously with time.
a) Increasing
b) Decreasing
c) Increasing or decreasing
d) Neither increasing nor decreasing

Explanation: Damped oscillations are those oscillations which decrease or increases continuously with time.

4. If the oscillation amplitude decreases continuously it is called ___________
a) Overdamped
b) Underdamped
c) Sustained
d) No specific name

Explanation: If the oscillation amplitude decreases continuously it is called underdamped oscillation.

5. If oscillation amplitude increases continuously it is called ___________
a) Overdamped
b) Underdamped
c) Sustained
d) No specific name

Explanation: If oscillation amplitude increases continuously it is called overdamped oscillation.

6. Which of the following is not an example of sinusoidal oscillator?
a) RC phase shift oscillator
b) Weinbridge oscillator
c) Crystal oscillator
d) Blocking oscillator

Explanation: A blocking oscillator is a non-sinusoidal oscillator. It produces a free running signal-square shaped and requires only a resistor, transformer and one amplifying element to work. The transistor is blocked off for most of the duty cycle, producing periodic pulses.

7. Mark-to-space ratio is related with ___________
a) Saw-tooth generator
b) LC oscillator
c) RC oscillator
d) Crystal oscillator

Explanation: MSR or Mark-to-space ratio is related with saw-tooth generator. It is the ratio of width of pulse to time between pulses.

8. The ratio of width of pulse to time between pulses are called ___________
a) PSRR
b) PSR
c) MSR
d) CMRR

Explanation: The ratio of the width of pulse to time between pulses is called MSR (Mark-to-Space ratio). Other abbreviation denotes PSRR (Power Supply Rejection Ratio), PSR (Power Supply Rejection), CMRR (Common Mode Rejection Ratio).

9. The time between one pulse to another is known as ___________
a) MSR
b) PRF
c) Time delay
d) PRT

Explanation: The time between one pulse to another is known as PRT (Power Repetition Time), other abbreviations denote PRF (Power Repetition Frequency), MSR (Mark-to-Space ratio).

10. The inverse of pulse repetition time gives _____________
a) PRF
b) PRT
c) MSR
d) PSR

Explanation: The inverse of pulse repetition time gives the PRF- pulse repetition frequency. MSR means mark to space ratio, PRT means power repetition time, PSR is power supply rejection.

Sanfoundry Global Education & Learning Series – Analog Circuits.

To practice all areas of Analog Circuits, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]