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Physics Oscillations Online Mcqs Test

Maan AliLast Updated: October 13, 2025

Important Oscillations Question and Answer

Total Questions:	87
Time Allowed:	40 Minutes
Total Marks:	87
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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Physics Oscillations Practice Test Online With Explanation

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Page 1 of 4

Physics

1. The process whereby energy is dissipated from the oscillating system in called

None

Resonance

Oscillation

Damping

2. At the frequency of 2450 MHz, the waves are absorbed due to resonance by

Water molecules

Both

All of these

Fat molecules

3. A pendulum clock set to give correct time in Karachi is taken to Quetta. It would give correct time if

The length of the pendulum is decreased

The mass of the pendulum is increased

The length of the pendulum is increased

The mass of the pendulum is decreased

4. The energy of the oscillation comes from the

Driving source

Applied force

None of these

Starting source

5. In case of a forced vibration, the resonance becomes very sharp when the

Applied periodic force is small

Quality factor is small

Damping force is small

Restoring force is small

6. A driven harmonic oscillator is the device in which, a physical system undergoes

Forced vibration

Free vibrations

Powerful vibration

None of these

7. Two springs of spring constants 1500 N/m and 3000 N/m respectively are stretched with the same force. They will have potential energy in the ratio

1 : 2

2 : 1

4 : 1

1 : 4

8. In a progressive wave, the distance between two consecutive crests is

λ/2

3/2 λ

2λ

9. Turning of a radio set is an example of

Musical resonance

Electrical resonance

Free vibration

Mechanical resonance

10. If mass attached to a spring increases, then its time period

Remains constant

Becomes zero

Increases

Decreases

11. In which case does the potential energy decreases?

One the rising of an air bubble in water

On stretching s spring

On moving a body against gravitational force

On compressing a spring

12. The energy absorbed by a body is _________ at resonance.

Maximum as well minimum

Minimum only

Zero

Maximum only

13. The damped oscillations are produced due to

System friction

Frictional support of the system

All of these

Air resistance

14. Restoring force is defined as

F = kx

F = -kx

F = ½ kx

F = ma

15. Oscillatory motion is a type of motion which is

All of these

To and fro

Periodic motions

Vibratory motion

16. If the magnitude of displacement is numerically equal to that of acceleration, then the time period is

2π second

π second

4π second

1 second

17. Simple harmonic motion is defined as the motion of a particle such that

Its acceleration is proportional to, and in the opposite direction to, the displacement

Its displacement x is related to its velocity b by the expression v = ωt.

Its displacement x is always given by the expression x = x₀ sin ωt.

Its acceleration is always ω²x₀ and its directed at right angles to its motion

18. In a seconds pendulum, mass of the bob is 30 gm. If it is replaced by 90 gm mass. Then its time period will be

3 s

1 s

2 s

4 s

19. Frequency is the term used for

Number of vibrations per minute

None of these

Number of vibration for second

Time to take one Vibration

20. S.I unit of frequency is

ms¯¹

Radian

Vibration S¯²

Hertz

21. The kinetic energy is maximum when mass at equilibrium

P.E.max 1.2 KX²

P.E.max 1.2 K² X

None of these

P.E.max 1.2 KX₀²

22. If a simple pendulum is shifted from Multan to Mount Everest, then its time period

Becomes zero

Decreases

Increases

Remains constant

23. In vibratory motion which parameter remains constant?

K.E. Energy

Total Energy

Angular Momentum

P.E. Energy

24. The damping depends upon

Sharpness

Both

None of these

Amplitude

25. If the length of the pendulum becomes four times, its time period will become

Nine times

Four times

Twice

Three times

Page 2 of 4

26. For a simple pendulum the restoring force is caused by

Gravity

Spring

Hand

All of these

27. When a body movies in a circle, its projection performs what type of motion?

Simple Harmonic Motion

Circular Motion

Angular Motion

Rectilinear Motion

28. A vertical mass-spring system executes simple harmonic oscillations with a period of 2s A quantity of this system which exhibits simple harmonic variation with a period of 1s is

Difference between kinetic energy and potential energy

Phase difference between acceleration and displacement

Velocity

Potential energy

29. The restoring force applied on the pendulum

Mg cos θ

-mg sin θ

-mg cos θ

Mg sin θ

30. The time period of a simple pendulum is 2 seconds. If its length is increased by 4 times, then its period becomes

8 s

4 s

16 s

12 s

31. If the period of oscillation of mass (M) suspended from a spring is 2s, then the period of mass 4M will be

3 s

2 s

1 s

4 s

32. Identify the exact statement among the following:

The fractional change in the time period of a pendulum on changing the temperature is independent of the length of the pendulum.

The greater the mass of pendulum bob, the shorter is its frequency of oscillation

As the length of a simple pendulum is increased, the maximum velocity of its bob during its oscillation will also increase

A simple pendulum with a bob of mass M swings with an angular amplitude of 40°. When its angular amplitude is 20°, the tension in the string is less than Mg cos 20°.

33. In energy conservation, when spring is stretched slowly so that acceleration is

Zero

None of these

Minimum

Maximum

34. The speed of a particle executing SHM along a circular path is given by the relation

V = ω√r² – x²

None of these

V = r² – x²

V = √r² – x²

35. The vibrating bodies produce

All of these

Sound

Waves

Disturbance

36. In which of the following lists are all three quantities constant when a particle moves in undamped simple harmonic motion?

Acceleration, force, total energy

Angular frequency, Acceleration, force

Total energy, amplitude, angular frequency

Amplitude, angular frequency, acceleration

37. The velocity of the body changes at different points, it is maximum at

Mean position

None of these

Extreme position

Between mean and extreme position

38. The type of motion in which an oscillating disturbance is transmitted from one position to the next without the actual rectilinear translation of the particles of the medium is called

Rotatory motion

Periodic motion

Rectilinear motion

Wave motion

39. Simple harmonic motion is mathematically represented as

F α – x

A α – x

V α – x

A α x

40. Specific response of a system which is able to oscillate with a certain period, to an external force acting with the same period is called

Resonance

Wavelength

Doppler’s effect

Time period

41. The velocity of the mass attached to a spring is maximum at

None

Mean position

Both a and b

Extreme position

42. Two springs of spring constants k₁ and k₂ are joined in series. The effective spring constant of the combination is given by

k₁ + k₂

k₁ k₂/( k₁ + k₂)

(k₁ + k₂)/2

√k₁ k₂

43. If the metal bob in a simple pendulum is replaced by a wooden bob, then its time period will

First A then B

Increases

Remain the same

Decreases

44. To make the frequency double of a spring oscillator, we have to:

Reduce the mass to one fourth

Quadruple the mass

Half the mass

Double the mass

45. The tension in the string of a simple pendulum is

Maximum in the extreme position

None of these

Constant

Zero in the mean position

46. Phenomenon of resonance is very often employed to determine the

Wavelength of the various bodies

Amplitudes of the various bodies

None of these

Wavelength of the various bodies

47. The frequency of these free oscillations is known as it s

Minimum frequency

None of these

Maximum frequency

Natural frequency

48. When the displacement is half of the amplitude, the ratio of potential energy to the total energy is

1/8

49. In case of a vibrating Pendulum, if the mass of the pendulum is doubled then its time period

Become on fourth

Becomes Double

Remains same

Becomes one half

50. The restoring force of S.H.M. is maximum when particle:

At rest

Crossing mean position

Half way between them

Displacement is maximum

Page 3 of 4

51. The waves produced in microwave oven have a wavelength

12cm

10cm

11.5cm

11cm

52. In case of a simple pendulum the cause of damping is

Drag force of air

Gravity

Tension is string

None of these

53. Which one of the following is a simple harmonic motion?

Ball bouncing between two rigid vertical walls

Earth spinning about its own axis

Wave moving through a string fixed at both ends.

Particle moving in a circle with uniform speed.

54. A simple pendulum is defined as

All of these

Light inextensible string

Friction less support

Small heavy mass

55. A pendulum suspended from the ceiling of a train has a period T when the train is at rest. When the train is accelerating with a uniform acceleration, the period of oscillation will

Remain unaffected

Become infinite

Increase

Decrease

56. Phase of SHM describes

Both displacement and direction of motion

Neither displacement nor direction of motion

Direction of motion only

Displacement only

57. In simple harmonic motion

The acceleration of the vibrating particle is ahead of displacement by a phase of π.

The velocity and displacement if the vibrating particle are in the same phase

The velocity and acceleration of the vibrating particle are in the same phase.

The velocity of the vibrating particle is ahead in phase of the displacement by and angle π.

58. The product of frequency and time period is equal to

59. In a simple harmonic motion (SHM), which of the following does not hold?

The force on the particle is maximum at the ends

The kinetic energy is maximum at the mean position

The acceleration is minimum at the mean position

The potential energy is maximum at the mean position

60. The waveform of simple harmonic motion will be

Saw tooth waveform

Square wave

Sine wave

None of these

61. A sine wave is represented by Q. The distance between the two particles having same maximum displacement is

2 λ

λ/4

λ/2

62. The potential energy of a spring executing SHM is given by the

½ Kx²

½ Kx

Kx²

63. In a simple harmonic motion (SHM), which of the following does not hold?

The potential energy is maximum at the mean position

The kinetic energy is maximum at the mean position

The acceleration is minimum at the mean position

The force on the particle is maximum at the ends

64. The time period so a system executing simple harmonic motion depends upon

B and C

Amplitude

Force constant

Mass

65. A simple harmonic motion in which the

Acceleration is directly proportional to displacement

Acceleration produced is due to restoring force

All of these

Acceleration is directed towards the mean position

66. In a garden, a boy is swinging in the standing position. How will the time period of the swing be affected if the boy sits down on the swing?

Time period will decrease

Time period will depend on the weight of the boy.

Time period will increase

Time period will not change

67. In a progressive wave, the distance between two consecutive crests is

2 λ

λ/2

3/2 λ

68. The work done is stretching spring appears as elastic potential energy of the spring is

P.E. = ½ KX²

P.E. = ½ K²X²

P.E. = ½ KX₀²

None of these

69. In a resonance striation, the driving force may be

Strong

Feeble

Weak

Extra ordinarily large

70. Total distance traveled by bob of simple pendulum in one vibration is equal to

Amplitude

Square of amplitude

2 x amplitude

4 x amplitude

71. Hook’s law is defined as

None of these

F and X are inverse proportional

F and X has no relation

F and X are direct proportional

72. In vibratory motion

K.E. remain constant

Total energy remain constant

Total momentum remain constant

P.E. remains constant

73. The frequency of second pendulum is

None of these

2 hertz

0.5 hertz

1 hertz

74. Forced vibration are known as

Natural vibration

Driven harmonic vibration

Simple harmonic vibration

Free vibration

75. The relation for the displacement in SHM is

X = X₀ sin ωt

X = X₀ cos (ωt + φ)

X = X₀ cos ωt

None of these

Page 4 of 4

76. In case of a vibrating Pendulum, the potential energy is maximum at

Mean Position

Extreme Position

None

Both a and b

77. The total energy of a particle, executing simple harmonic moron is

∞ x

Independent of x

∞ x²

∞ √x

78. In a simple harmonic oscillator, at the mean position

Both kinetic and potential energies are maximum

Kinetic energy is maximum, potential energy is minimum

Kinetic energy is minimum, potential energy is maximum

Both kinetic and potential energies are minimum

79. If mass attached to a spring increases, then its time period

Decreases

Becomes zero

Increases

Remains constant

80. To make the frequency double of an oscillator, we have to

Quadruple the mass

Half the mass

Reduce the mass to one-fourth

Double the mass

81. A particle executes SHM. The graph of its velocity as a function of displacement is

A straight line

A circle

An ellipse

A hyperbola

82. The body oscillates due to a

None of these

Frictional force

Applied force

Restoring force

83. The effective component of Vp or the velocity of the particle is given by

Vp cos θ

Vp sin (90° - θ)

X₀ ω cos θ

All of these

84. Natural frequency of simple pendulum depends upon

Its mass

Square root of its length

Its length

Square of its length

85. One vibration means, the motion of mass from its

From extreme position

From means position to back to its means position

Means position to upper extreme position

All of these

86. A pendulum clock set to give correct time in Karachi is taken to Quetta. It would give correct time if

The mass of the pendulum is increased

The length of the pendulum is decreased

The mass of the pendulum is decreased

The length of the pendulum is increased

87. The distance covered by a body in one complete vibration is 20cm. What is the amplitude of body?

7.5 cm

10 cm

5 cm

15 cm

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Maan AliLast Updated: October 13, 2025

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Physics Oscillations Online Mcqs Test

Important Oscillations Question and Answer

Physics Oscillations Practice Test Online With Explanation

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