# [Top 100] Simple Oscillator Circuit MCQs with Answers

[Top 100] Simple Oscillator Circuit MCQs with Answers: Following are the questions quiz from Chapter 1 Oscillator (Oscillator MCQs)

## Oscillator MCQs

a. Diode

b. Transistor

c. Capacitor

d. Resistor

#### 2. The frequency of an LC oscillator can be changed by adjusting:

a. The inductance of the coil

b. The capacitance of the capacitor

c. The resistance of the resistor

d. Both a and b

Answer: d. Both a and b

#### 3. Which type of oscillator uses a quartz crystal to maintain its frequency?

a. RC oscillator

b. LC oscillator

c. Crystal oscillator

d. Colpitts oscillator

a. Inductor

b. Capacitor

c. Resistor

d. Transistor

#### 5. Which oscillator circuit is commonly used in radio transmitters and receivers?

a. Hartley oscillator

b. Colpitts oscillator

c. Wien bridge oscillator

d. Astable multivibrator

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

#### 7. The phase shift oscillator circuit consists of:

a. Only resistors

b. Only capacitors

c. Only inductors

d. Both resistors and capacitors

Answer: d. Both resistors and capacitors

a. Low

b. Medium

c. High

d. Very high

#### 9. Which oscillator circuit is commonly used in audio oscillators and tone generators?

a. Hartley oscillator

b. Colpitts oscillator

c. Wien bridge oscillator

d. Phase shift oscillator

#### 10. Which oscillator circuit is commonly used in frequency synthesizers and frequency modulators?

a. Hartley oscillator

b. Colpitts oscillator

c. Pierce oscillator

d. Crystal oscillator

## oscillator questions and answers pdf

11. What is the condition for oscillation in a negative feedback oscillator?

a. Phase shift is 0 degrees

b. Phase shift is 180 degrees

c. Phase shift is between 0 and 180 degrees

d. Phase shift is greater than 180 degrees

Answer: c. Phase shift is between 0 and 180 degrees

12. Which of the following is an example of a relaxation oscillator?

a. Astable multivibrator

b. Colpitts oscillator

c. Hartley oscillator

d. Crystal oscillator

13. The frequency of a crystal oscillator is determined by:

a. The value of the inductor

b. The value of the capacitor

c. The physical dimensions of the crystal

d. The value of the resistor

Answer: c. The physical dimensions of the crystal

14. Which of the following is a disadvantage of the Wien bridge oscillator?

a. It is difficult to design and construct

b. It has poor frequency stability

c. It has low output amplitude

d. It requires a large number of components

Answer: b. It has poor frequency stability

15. In a Colpitts oscillator, the feedback is provided by:

a. An inductor and two capacitors

b. A resistor and a capacitor

c. Two resistors and a capacitor

d. A transformer and a capacitor

Answer: a. An inductor and two capacitors

16. The output waveform of a sine wave oscillator is:

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

17. Which oscillator circuit is commonly used in audio power amplifiers?

a. Hartley oscillator

b. Colpitts oscillator

c. Phase shift oscillator

d. Wien bridge oscillator

18. What is the frequency range of an LC oscillator?

a. Low frequency

b. Medium frequency

c. High frequency

d. Very high frequency

19. The frequency stability of an RC oscillator is:

a. Low

b. Medium

c. High

d. Very high

20. The output waveform of a triangle wave oscillator is:

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

## simple harmonic motion mcq

21. What is the main advantage of a crystal oscillator over other types of oscillators?

a. High frequency stability

b. Low power consumption

c. Low cost

d. High output power

22. The frequency of an RC oscillator is determined by:

a. The value of the resistor

b. The value of the capacitor

c. Both a and b

d. The type of transistor used

Answer: c. Both a and b

23. In a Wien bridge oscillator, the feedback network consists of:

a. Two resistors and a capacitor

b. Two capacitors and a resistor

c. A transformer and a capacitor

d. An inductor and a capacitor

Answer: b. Two capacitors and a resistor

24. Which oscillator circuit is commonly used in voltage-controlled oscillators (VCOs)?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Phase locked loop (PLL)

25. The frequency stability of a LC oscillator is:

a. Low

b. Medium

c. High

d. Very high

26. What is the main advantage of a voltage-controlled oscillator (VCO)?

a. High frequency stability

b. Low power consumption

c. Frequency can be varied over a wide range

d. Low cost

Answer: c. Frequency can be varied over a wide range

27. In an LC oscillator, what component provides the energy for oscillation?

a. Capacitor

b. Resistor

c. Inductor

d. Transistor

28. What is the condition for oscillation in a positive feedback oscillator?

a. Phase shift is 0 degrees

b. Phase shift is 180 degrees

c. Phase shift is between 0 and 180 degrees

d. Phase shift is greater than 180 degrees

Answer: d. Phase shift is greater than 180 degrees

29. Which oscillator circuit is commonly used in digital clocks and watches?

a. Colpitts oscillator

b. Pierce oscillator

c. Wien bridge oscillator

d. Astable multivibrator

30. The frequency stability of a phase-locked loop (PLL) oscillator is:

a. Low

b. Medium

c. High

d. Very high

## shm mcq for neet

31. Which of the following oscillator circuits is commonly used in radio transmitters and receivers?

a. Pierce oscillator

b. Hartley oscillator

c. Phase-locked loop (PLL) oscillator

d. Wien bridge oscillator

32. The frequency stability of a crystal oscillator is affected by:

a. Temperature changes

b. Voltage fluctuations

c. Component tolerances

d. All of the above

Answer: d. All of the above

33. What is the output waveform of a square wave oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

34. What is the condition for sustained oscillations in an LC oscillator?

a. The loop gain is greater than 1

b. The loop gain is less than 1

c. The loop gain is equal to 1

d. The phase shift is 180 degrees

Answer: a. The loop gain is greater than 1

35. Which of the following oscillator circuits is commonly used in frequency synthesizers?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Phase-locked loop (PLL) oscillator

Answer: d. Phase-locked loop (PLL) oscillator

36. What is the output waveform of a sawtooth wave oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

37. Which of the following oscillator circuits is commonly used in audio oscillators?

a. Colpitts oscillator

b. Hartley oscillator

c. Phase shift oscillator

d. Wien bridge oscillator

38. The frequency of a Wien bridge oscillator can be varied by changing the value of:

a. The resistor

b. The capacitor

c. Both a and b

d. None of the above

Answer: c. Both a and b

39. What is the output waveform of a pulse wave oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

40. Which of the following oscillator circuits is commonly used in crystal oscillators?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Phase shift oscillator

## sinusoidal oscillator mcq

41. The frequency stability of an RC oscillator is affected by:

a. Temperature changes

b. Voltage fluctuations

c. Component tolerances

d. All of the above

Answer: d. All of the above

42. What is the main disadvantage of a Wien bridge oscillator?

a. High frequency stability

b. Low distortion

c. Low output power

d. Difficult to design

43. Which of the following oscillator circuits is commonly used in audio amplifiers?

a. Colpitts oscillator

b. Hartley oscillator

c. Phase shift oscillator

d. Wien bridge oscillator

44. The frequency stability of an RC phase shift oscillator is affected by:

a. Temperature changes

b. Voltage fluctuations

c. Component tolerances

d. All of the above

45. What is the output waveform of a sine wave oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

46. What is the condition for oscillation in a negative feedback oscillator?

a. Phase shift is 0 degrees

b. Phase shift is 180 degrees

c. Phase shift is between 0 and 180 degrees

d. Phase shift is greater than 180 degrees

Answer: b. Phase shift is 180 degrees

47. Which oscillator circuit is commonly used in microcontrollers and digital signal processors (DSPs)?

a. Colpitts oscillator

b. Pierce oscillator

c. Wien bridge oscillator

d. Relaxation oscillator

48. What is the main disadvantage of a LC oscillator?

a. Low frequency stability

b. High distortion

c. High output power

d. Difficult to design

49. Which of the following oscillator circuits is commonly used in frequency counters and sweep generators?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Voltage-controlled oscillator (VCO)

50. What is the output waveform of a triangle wave oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

## Simple Oscillator Circuit MCQs

51. Which of the following oscillator circuits is commonly used in analog-to-digital converters (ADCs)?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Ramp generator oscillator

52. What is the main advantage of a crystal oscillator over other types of oscillators?

a. High output power

b. Low distortion

c. High frequency stability

d. Low cost

53. What is the output waveform of a phase shift oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

54. Which of the following oscillator circuits is commonly used in synthesizers and signal generators?

a. Colpitts oscillator

b. Hartley oscillator

c. Phase locked loop (PLL) oscillator

d. Wien bridge oscillator

Answer: c. Phase locked loop (PLL) oscillator

55. What is the main disadvantage of a relaxation oscillator?

a. Low frequency stability

b. High distortion

c. High output power

d. Difficult to design

56. Which of the following oscillator circuits is commonly used in voltage-controlled oscillators (VCOs)?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Phase shift oscillator

57. What is the output waveform of a sine wave oscillator based on an op-amp?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

58. Which of the following oscillator circuits is commonly used in phase-locked loop (PLL) oscillators?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Voltage-controlled oscillator (VCO)

59. The frequency stability of a voltage-controlled oscillator (VCO) is affected by:

a. Temperature changes

b. Voltage fluctuations

c. Component tolerances

d. Control voltage variations

60. Which of the following oscillator circuits is commonly used in LC tank circuits?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Phase shift oscillator

61. Which of the following oscillator circuits is commonly used in radio frequency (RF) oscillators?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Phase shift oscillator

62. What is the output waveform of a square wave oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

63. Which of the following oscillator circuits is commonly used in clocks and timers?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Relaxation oscillator

64. What is the main disadvantage of a Pierce oscillator?

a. Low frequency stability

b. High distortion

c. Low output power

d. Difficult to design

65. Which of the following oscillator circuits is commonly used in crystal oscillators?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Phase shift oscillator

66. What is the output waveform of a sawtooth wave oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

67. What is the main advantage of a LC oscillator over other types of oscillators?

a. High output power

b. Low distortion

c. High frequency stability

d. Low cost

68. Which of the following oscillator circuits is commonly used in crystal oscillators for microcontrollers and microprocessors?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Relaxation oscillator

69. What is the main disadvantage of a phase shift oscillator?

a. Low frequency stability

b. High distortion

c. Low output power

d. Difficult to design

70. Which of the following oscillator circuits is commonly used in frequency synthesizers?

a. Colpitts oscillator

b. Hartley oscillator

c. Phase locked loop (PLL) oscillator

d. Wien bridge oscillator

Answer: c. Phase locked loop (PLL) oscillator

## crystal oscillator basics

71. The frequency stability of a crystal oscillator is affected by:

a. Temperature changes

b. Voltage fluctuations

c. Component tolerances

d. All of the above

72. What is the output waveform of a relaxation oscillator based on a transistor?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

73. Which of the following oscillator circuits is commonly used in sweep generators?

a. Colpitts oscillator

b. Hartley oscillator

c. Phase shift oscillator

d. Wien bridge oscillator

74. What is the main disadvantage of a voltage-controlled oscillator (VCO)?

a. Low frequency stability

b. High distortion

c. Low output power

d. Difficult to design

75. Which of the following oscillator circuits is commonly used in audio oscillators?

a. Colpitts oscillator

b. Hartley oscillator

c. Phase shift oscillator

d. Wien bridge oscillator

76. What is the output waveform of a ramp generator oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

77. Which of the following oscillator circuits is commonly used in radio transmitters?

a. Colpitts oscillator

b. Hartley oscillator

c. Phase shift oscillator

d. Wien bridge oscillator

78. What is the main disadvantage of a Wien bridge oscillator?

a. Low frequency stability

b. High distortion

c. Low output power

d. Difficult to design

79. Which of the following oscillator circuits is commonly used in function generators?

a. Colpitts oscillator

b. Hartley oscillator

c. Phase shift oscillator

d. Wien bridge oscillator

80. What is the output waveform of a sine wave oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

## oscillator with best frequency stability is mcq

81. Which of the following oscillator circuits is commonly used in audio frequency (AF) oscillators?

a. Colpitts oscillator

b. Hartley oscillator

c. Phase shift oscillator

d. Wien bridge oscillator

82. What is the main advantage of a relaxation oscillator?

a. High frequency stability

b. Low distortion

c. High output power

d. Easy to design

83. Which of the following oscillator circuits is commonly used in signal generators?

a. Colpitts oscillator

b. Hartley oscillator

c. Phase shift oscillator

d. Wien bridge oscillator

84. What is the main disadvantage of a LC tank oscillator?

a. Low output power

b. High distortion

c. Low frequency stability

d. Difficult to design

85. Which of the following oscillator circuits is commonly used in voltage-controlled oscillators (VCOs)?

a. Colpitts oscillator

b. Hartley oscillator

c. Phase locked loop (PLL) oscillator

d. Wien bridge oscillator

86. What is the output waveform of a function generator oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

87. Which of the following oscillator circuits is commonly used in frequency counters?

a. Colpitts oscillator

b. Hartley oscillator

c. Phase locked loop (PLL) oscillator

d. Wien bridge oscillator

Answer: c. Phase locked loop (PLL) oscillator

88. What is the main advantage of a Wien bridge oscillator?

a. High frequency stability

b. Low distortion

c. High output power

d. Easy to design

89. Which of the following oscillator circuits is commonly used in crystal oscillators for frequency synthesis?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Relaxation oscillator

90. What is the output waveform of a phase shift oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

91. Which of the following oscillator circuits is commonly used in microcontrollers?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Relaxation oscillator

92. What is the main disadvantage of a crystal oscillator?

a. Low frequency stability

b. High distortion

c. Low output power

d. Limited frequency range

93. Which of the following oscillator circuits is commonly used in frequency modulation (FM) transmitters?

a. Colpitts oscillator

b. Hartley oscillator

c. Phase locked loop (PLL) oscillator

d. Varactor-tuned LC oscillator

94. What is the main advantage of a voltage-controlled oscillator (VCO)?

a. High frequency stability

b. Low distortion

c. High output power

d. Frequency tunability

95. Which of the following oscillator circuits is commonly used in temperature-compensated crystal oscillators (TCXOs)?

a. Colpitts oscillator

b. Pierce oscillator

c. Wien bridge oscillator

d. Relaxation oscillator

96. What is the output waveform of a ring oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave

97. Which of the following oscillator circuits is commonly used in voltage-controlled crystal oscillators (VCXOs)?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Wien bridge oscillator

98. What is the main disadvantage of a relaxation oscillator?

a. Low frequency stability

b. High distortion

c. Low output power

d. Limited frequency range

99. Which of the following oscillator circuits is commonly used in phase-locked loops (PLLs)?

a. Colpitts oscillator

b. Hartley oscillator

c. Pierce oscillator

d. Wien bridge oscillator

100. What is the output waveform of a crystal oscillator?

a. Sine wave

b. Triangle wave

c. Square wave

d. Sawtooth wave