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

The acceleration is minimum at the mean position

The force on the particle is maximum at the ends

The potential energy is maximum at the mean position

The kinetic energy is maximum at the mean position

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

Amplitude, angular frequency, acceleration

Total energy, amplitude, angular frequency

Angular frequency, Acceleration, force

Acceleration, force, total energy

3. Restoring force is defined as

F = -kx

F = ma

F = kx

F = ½ kx

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

Ball bouncing between two rigid vertical walls

Earth spinning about its own axis

Particle moving in a circle with uniform speed.

Wave moving through a string fixed at both ends.

5. In vibratory motion which parameter remains constant?

Total Energy

K.E. Energy

Angular Momentum

P.E. Energy

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

Gravity

All of these

Spring

Hand

7. 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

(k₁ + k₂)/2

8. 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

9. Simple harmonic motion is mathematically represented as

A α x

A α – x

F α – x

V α – x

10. The frequency of second pendulum is

None of these

2 hertz

0.5 hertz

1 hertz

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

Amplitude

Force constant

B and C

Mass

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

λ/4

2 λ

λ/2

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

Becomes Double

Becomes one half

Become on fourth

Remains same

14. 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

Time period

Wavelength

Doppler’s effect

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

None of these

Amplitudes of the various bodies

Wavelength of the various bodies

16. The waveform of simple harmonic motion will be

Saw tooth waveform

Square wave

Sine wave

None of these

17. Identify the exact statement among the following:

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

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

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°.

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

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

All of these

Means position to upper extreme position

From means position to back to its means position

From extreme position

19. Turning of a radio set is an example of

Mechanical resonance

Electrical resonance

Musical resonance

Free vibration

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

1/8

21. The relation for the displacement in SHM is

None of these

X = X₀ cos ωt

X = X₀ sin ωt

X = X₀ cos (ωt + φ)

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

An ellipse

A hyperbola

A straight line

A circle

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

Tension is string

Drag force of air

None of these

Gravity

24. 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

Wave motion

Rotatory motion

Rectilinear motion

Periodic motion

25. A simple harmonic motion in which the

Acceleration produced is due to restoring force

All of these

Acceleration is directly proportional to displacement

Acceleration is directed towards the mean position

Page 2 of 4

26. The body oscillates due to a

Frictional force

None of these

Applied force

Restoring force

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

Kinetic energy is minimum, potential energy is maximum

Both kinetic and potential energies are maximum

Both kinetic and potential energies are minimum

Kinetic energy is maximum, potential energy is minimum

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

Remains constant

Increases

Decreases

Becomes zero

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

Half way between them

At rest

Displacement is maximum

Crossing mean position

30. 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

4 s

3 s

2 s

1 s

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

The acceleration is minimum at the mean position

The kinetic energy is maximum at the mean position

The potential energy is maximum at the mean position

The force on the particle is maximum at the ends

32. The vibrating bodies produce

All of these

Sound

Waves

Disturbance

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

15 cm

5 cm

10 cm

7.5 cm

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

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

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

½ Kx²

½ Kx

Kx²

36. The restoring force applied on the pendulum

Mg cos θ

-mg cos θ

-mg sin θ

Mg sin θ

37. The kinetic energy is maximum when mass at equilibrium

None of these

P.E.max 1.2 K² X

P.E.max 1.2 KX₀²

P.E.max 1.2 KX²

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

4 s

3 s

1 s

2 s

39. Oscillatory motion is a type of motion which is

Vibratory motion

All of these

Periodic motions

To and fro

40. Forced vibration are known as

Natural vibration

Driven harmonic vibration

Simple harmonic vibration

Free vibration

41. Hook’s law is defined as

F and X are inverse proportional

None of these

F and X has no relation

F and X are direct proportional

42. S.I unit of frequency is

Hertz

ms¯¹

Radian

Vibration S¯²

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

Zero in the mean position

Constant

Maximum in the extreme position

None of these

44. 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 decreased

The length of the pendulum is increased

The mass of the pendulum is increased

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

16 s

12 s

8 s

4 s

46. Natural frequency of simple pendulum depends upon

Its length

Its mass

Square of its length

Square root of its length

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

Water molecules

Both

Fat molecules

All of these

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

Reduce the mass to one-fourth

Half the mass

Quadruple the mass

Double the mass

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

First A then B

Increases

Decreases

Remain the same

50. 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 increase

Time period will not change

Time period will depend on the weight of the boy.

Time period will decrease

Page 3 of 4

51. The waves produced in microwave oven have a wavelength

11.5cm

11cm

12cm

10cm

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

Maximum as well minimum

Minimum only

Zero

Maximum only

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

Feeble

Strong

Extra ordinarily large

Weak

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

55. In vibratory motion

K.E. remain constant

Total energy remain constant

P.E. remains constant

Total momentum remain constant

56. 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

Increase

Remain unaffected

Become infinite

Decrease

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

3/2 λ

2 λ

λ/2

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

Both a and b

Extreme Position

None

Mean Position

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

Both a and b

Extreme position

Mean position

None

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

2λ

λ/2

3/2 λ

61. 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 mass of the pendulum is decreased

The length of the pendulum is decreased

The length of the pendulum is increased

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

Applied periodic force is small

Quality factor is small

Restoring force is small

Damping force is small

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

π second

2π second

4π second

1 second

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

V = √r² – x²

V = ω√r² – x²

None of these

V = r² – x²

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

Maximum frequency

None of these

Natural frequency

Minimum frequency

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

Vp sin (90° - θ)

Vp cos θ

X₀ ω cos θ

All of these

67. In which case does the potential energy decreases?

On compressing a spring

One the rising of an air bubble in water

On stretching s spring

On moving a body against gravitational force

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

None of these

Zero

Maximum

Minimum

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

Remains constant

Becomes zero

Decreases

Increases

70. The energy of the oscillation comes from the

None of these

Applied force

Starting source

Driving source

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

Circular Motion

Rectilinear Motion

Simple Harmonic Motion

Angular Motion

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

Between mean and extreme position

Mean position

Extreme position

None of these

73. Frequency is the term used for

Number of vibration for second

None of these

Time to take one Vibration

Number of vibrations per minute

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

Reduce the mass to one fourth

Double the mass

Quadruple the mass

Half the mass

75. Phase of SHM describes

Displacement only

Neither displacement nor direction of motion

Both displacement and direction of motion

Direction of motion only

Page 4 of 4

76. In simple harmonic motion

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

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

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

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

77. A simple pendulum is defined as

Light inextensible string

Small heavy mass

Friction less support

All of these

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

Forced vibration

Powerful vibration

None of these

Free vibrations

79. 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

Potential energy

Phase difference between acceleration and displacement

Velocity

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

Resonance

None

Damping

Oscillation

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

4 x amplitude

2 x amplitude

Amplitude

Square of amplitude

82. The damping depends upon

Sharpness

Both

Amplitude

None of these

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

Independent of x

∞ √x

∞ x²

∞ x

84. The damped oscillations are produced due to

System friction

All of these

Air resistance

Frictional support of the system

85. 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

4 : 1

2 : 1

1 : 2

1 : 4

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

Twice

Three times

Nine times

Four times

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

Remains constant

Increases

Becomes zero

Decreases

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Maan AliLast Updated: October 13, 2025

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November 8, 2016 at 12:26 am

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Important Oscillations Question and Answer

Physics Oscillations Practice Test Online With Explanation

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