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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 waveform of simple harmonic motion will be

Sine wave

Saw tooth waveform

Square wave

None of these

2. 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)/2

k₁ + k₂

k₁ k₂/( k₁ + k₂)

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

λ/2

2 λ

3/2 λ

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

Half the mass

Quadruple the mass

Reduce the mass to one-fourth

Double the mass

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

Remains constant

Increases

Becomes zero

Decreases

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

Extreme position

Both a and b

Mean position

None

7. 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

Decrease

Become infinite

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

Free vibrations

None of these

Powerful vibration

Forced vibration

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

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

2π second

1 second

4π second

π second

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

Independent of x

∞ x

∞ √x

∞ x²

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

Both kinetic and potential energies are maximum

Both kinetic and potential energies are minimum

Kinetic energy is minimum, potential energy is maximum

Kinetic energy is maximum, potential energy is minimum

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

4 x amplitude

2 x amplitude

Amplitude

Square of amplitude

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

Four times

Three times

Twice

Nine times

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

Becomes zero

Remains constant

Increases

Decreases

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

The potential energy is maximum at the mean position

The acceleration is minimum at the mean position

The kinetic energy is maximum at the mean position

The force on the particle is maximum at the ends

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

½ Kx²

Kx²

½ Kx

18. Oscillatory motion is a type of motion which is

All of these

Periodic motions

Vibratory motion

To and fro

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

Extreme position

None of these

Mean position

Between mean and extreme position

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

Displacement is maximum

Crossing mean position

Half way between them

At rest

21. The restoring force applied on the pendulum

Mg sin θ

-mg sin θ

Mg cos θ

-mg cos θ

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

The potential energy is maximum at the mean position

The force on the particle is maximum at the ends

The acceleration is minimum at the mean position

The kinetic energy is maximum at the mean position

23. The kinetic energy is maximum when mass at equilibrium

None of these

P.E.max 1.2 KX₀²

P.E.max 1.2 K² X

P.E.max 1.2 KX²

24. The damping depends upon

None of these

Both

Sharpness

Amplitude

25. The vibrating bodies produce

Disturbance

Waves

All of these

Sound

Page 2 of 4

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

Both

Fat molecules

Water molecules

All of these

27. Frequency is the term used for

Time to take one Vibration

Number of vibration for second

None of these

Number of vibrations per minute

28. 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

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

Maximum in the extreme position

None of these

Constant

Zero in the mean position

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

Mass

B and C

Amplitude

Force constant

31. S.I unit of frequency is

Vibration S¯²

Hertz

Radian

ms¯¹

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

Rectilinear Motion

Angular Motion

Simple Harmonic Motion

Circular Motion

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

P.E. = ½ K²X²

None of these

P.E. = ½ KX²

P.E. = ½ KX₀²

34. The energy of the oscillation comes from the

Starting source

Driving source

Applied force

None of these

35. Restoring force is defined as

F = -kx

F = ma

F = kx

F = ½ kx

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

Increases

Remain the same

First A then B

Decreases

37. 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 increased

The mass of the pendulum is increased

The mass of the pendulum is decreased

The length of the pendulum is decreased

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

1/8

39. The body oscillates due to a

Applied force

Frictional force

Restoring force

None of these

40. The relation for the displacement in SHM is

X = X₀ cos ωt

X = X₀ cos (ωt + φ)

None of these

X = X₀ sin ωt

41. The damped oscillations are produced due to

All of these

Frictional support of the system

Air resistance

System friction

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

Maximum

Minimum

Zero

None of these

43. 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.

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

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

44. 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

2 s

1 s

4 s

3 s

45. Natural frequency of simple pendulum depends upon

Square root of its length

Its length

Its mass

Square of its length

46. In vibratory motion

Total energy remain constant

Total momentum remain constant

P.E. remains constant

K.E. remain constant

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

Extra ordinarily large

Strong

Weak

Feeble

48. 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

1 : 4

4 : 1

2 : 1

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

None of these

Wavelength of the various bodies

Amplitudes of the various bodies

Wavelength of the various bodies

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

3/2 λ

λ/2

2λ

Page 3 of 4

51. 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 depend on the weight of the boy.

Time period will decrease

Time period will not change

Time period will increase

52. Hook’s law is defined as

F and X are direct proportional

F and X has no relation

F and X are inverse proportional

None of these

53. 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

2 s

1 s

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

Gravity

Spring

All of these

Hand

55. A simple harmonic motion in which the

Acceleration is directly proportional to displacement

All of these

Acceleration produced is due to restoring force

Acceleration is directed towards the mean position

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

5 cm

7.5 cm

15 cm

10 cm

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

12 s

4 s

8 s

16 s

58. Forced vibration are known as

Driven harmonic vibration

Free vibration

Natural vibration

Simple harmonic vibration

59. The frequency of second pendulum is

None of these

1 hertz

2 hertz

0.5 hertz

60. Turning of a radio set is an example of

Musical resonance

Free vibration

Mechanical resonance

Electrical resonance

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

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

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

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

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

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

V = √r² – x²

V = ω√r² – x²

V = r² – x²

None of these

63. A simple pendulum is defined as

All of these

Friction less support

Small heavy mass

Light inextensible string

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

Double the mass

Quadruple the mass

Half the mass

Reduce the mass to one fourth

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

Maximum as well minimum

Zero

Maximum only

Minimum only

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

Minimum frequency

Maximum frequency

None of these

Natural frequency

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

Damping force is small

Restoring force is small

Applied periodic force is small

Quality factor is small

68. In which case does the potential energy decreases?

On moving a body against gravitational force

One the rising of an air bubble in water

On compressing a spring

On stretching s spring

69. Phase of SHM describes

Direction of motion only

Neither displacement nor direction of motion

Displacement only

Both displacement and direction of motion

70. 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 mass of the pendulum is increased

The length of the pendulum is increased

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

Particle moving in a circle with uniform speed.

Ball bouncing between two rigid vertical walls

Earth spinning about its own axis

Wave moving through a string fixed at both ends.

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

2 λ

λ/4

λ/2

73. In simple harmonic motion

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

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.

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

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

Oscillation

None

Damping

Resonance

75. 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

Page 4 of 4

76. 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

Rectilinear motion

Rotatory motion

Wave motion

Periodic motion

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

Total energy, amplitude, angular frequency

Angular frequency, Acceleration, force

Amplitude, angular frequency, acceleration

Acceleration, force, total energy

78. 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

Phase difference between acceleration and displacement

Difference between kinetic energy and potential energy

Potential energy

Velocity

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

Mean Position

None

Extreme Position

Both a and b

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

Tension is string

None of these

Gravity

Drag force of air

81. In vibratory motion which parameter remains constant?

K.E. Energy

Angular Momentum

P.E. Energy

Total Energy

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

Vp sin (90° - θ)

Vp cos θ

All of these

X₀ ω cos θ

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

Decreases

Increases

Remains constant

Becomes zero

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

A straight line

A hyperbola

An ellipse

A circle

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

Become on fourth

Remains same

Becomes Double

Becomes one half

86. The waves produced in microwave oven have a wavelength

10cm

12cm

11cm

11.5cm

87. Simple harmonic motion is mathematically represented as

F α – x

A α x

V α – x

A α – x

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Maan AliLast Updated: October 13, 2025

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Physics Oscillations Online Mcqs Test

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