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ECAT Physics Oscillations Test Online

Maan AliLast Updated: April 18, 2025

Physics Oscillations MCQS Online Test

ECAT Physics Oscillations Chapter Online Test

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 Chapter Online Test

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Page 1 of 4

Physics

1. The relation for the displacement in SHM is

X = X₀ sin ωt

X = X₀ cos (ωt + φ)

None of these

X = X₀ cos ωt

2. The waveform of simple harmonic motion will be

Saw tooth waveform

Sine wave

None of these

Square wave

3. 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

4. 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

Periodic motion

Wave motion

Rectilinear motion

Rotatory motion

5. The damping depends upon

Amplitude

Sharpness

Both

None of these

6. Forced vibration are known as

Simple harmonic vibration

Natural vibration

Driven harmonic vibration

Free vibration

7. Oscillatory motion is a type of motion which is

Vibratory motion

Periodic motions

To and fro

All of these

8. The energy of the oscillation comes from the

Starting source

None of these

Applied force

Driving source

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

Reduce the mass to one fourth

Half the mass

Quadruple the mass

Double the mass

10. The damped oscillations are produced due to

Frictional support of the system

System friction

All of these

Air resistance

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

P.E. = ½ KX²

P.E. = ½ KX₀²

None of these

P.E. = ½ K²X²

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

Wavelength of the various bodies

None of these

Amplitudes of the various bodies

Wavelength of the various bodies

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

A circle

A straight line

A hyperbola

An ellipse

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

Extreme position

Both a and b

None

Mean position

15. Turning of a radio set is an example of

Free vibration

Musical resonance

Mechanical resonance

Electrical resonance

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

Wave moving through a string fixed at both ends.

Earth spinning about its own axis

Particle moving in a circle with uniform speed.

Ball bouncing between two rigid vertical walls

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

10 cm

7.5 cm

5 cm

15 cm

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

Mean position

Extreme position

Between mean and extreme position

None of these

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

Forced vibration

Free vibrations

Powerful vibration

None of these

20. 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 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.

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

Remains constant

Becomes zero

Decreases

Increases

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

Spring

All of these

Hand

Gravity

23. 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 not change

Time period will decrease

Time period will depend on the weight of the boy.

Time period will increase

24. 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

Become infinite

Remain unaffected

Decrease

Increase

25. 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

4 s

2 s

Page 2 of 4

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

2λ

λ/2

3/2 λ

27. 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

1 : 2

2 : 1

1 : 4

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

1/8

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

Remains constant

Decreases

Becomes zero

Increases

30. The body oscillates due to a

Restoring force

Frictional force

Applied force

None of these

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

Gravity

Drag force of air

Tension is string

None of these

32. Natural frequency of simple pendulum depends upon

Square root of its length

Its mass

Square of its length

Its length

33. In vibratory motion

Total energy remain constant

Total momentum remain constant

K.E. remain constant

P.E. remains constant

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

Resonance

None

Oscillation

Damping

35. 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

Potential energy

Difference between kinetic energy and potential energy

Velocity

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

Half way between them

Crossing mean position

At rest

Displacement is maximum

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

Kx²

½ Kx²

½ Kx

38. Frequency is the term used for

Time to take one Vibration

Number of vibration for second

Number of vibrations per minute

None of these

39. The frequency of second pendulum is

1 hertz

None of these

2 hertz

0.5 hertz

40. 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 mass of the pendulum is decreased

The length of the pendulum is increased

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

Remains constant

Becomes zero

Increases

Decreases

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

Kinetic energy is minimum, potential energy is maximum

Kinetic energy is maximum, potential energy is minimum

Both kinetic and potential energies are maximum

Both kinetic and potential energies are minimum

43. 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

Time period

Resonance

Doppler’s effect

Wavelength

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

Minimum only

Maximum only

Zero

Maximum as well minimum

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

None of these

Minimum

Zero

Maximum

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

Extreme Position

Mean Position

None

Both a and b

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

∞ x

∞ √x

Independent of x

∞ x²

48. In vibratory motion which parameter remains constant?

P.E. Energy

Total Energy

K.E. Energy

Angular Momentum

49. Restoring force is defined as

F = ½ kx

F = kx

F = ma

F = -kx

50. 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

Page 3 of 4

51. S.I unit of frequency is

Radian

Hertz

Vibration S¯²

ms¯¹

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

2 λ

λ/2

λ/4

53. In which case does the potential energy decreases?

On stretching s spring

On compressing a spring

On moving a body against gravitational force

One the rising of an air bubble in water

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

4π second

1 second

π second

2π second

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

Amplitude, angular frequency, acceleration

Angular frequency, Acceleration, force

Total energy, amplitude, angular frequency

Acceleration, force, total energy

56. The vibrating bodies produce

All of these

Waves

Sound

Disturbance

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

Extra ordinarily large

Strong

Weak

Feeble

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

All of these

Water molecules

Both

Fat molecules

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

(k₁ + k₂)/2

√k₁ k₂

k₁ k₂/( k₁ + k₂)

k₁ + k₂

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

Damping force is small

Restoring force is small

Quality factor is small

Applied periodic force is small

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

Half the mass

Double the mass

Reduce the mass to one-fourth

Quadruple the mass

62. Simple harmonic motion is mathematically represented as

V α – x

F α – x

A α x

A α – x

63. The restoring force applied on the pendulum

-mg cos θ

Mg sin θ

Mg cos θ

-mg sin θ

64. Hook’s law is defined as

F and X has no relation

F and X are inverse proportional

None of these

F and X are direct proportional

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

V = √r² – x²

V = r² – x²

V = ω√r² – x²

None of these

66. Identify the exact statement among the following:

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°.

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.

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

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

Increases

First A then B

Remain the same

Decreases

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

Rectilinear Motion

Angular Motion

Simple Harmonic Motion

Circular Motion

69. The waves produced in microwave oven have a wavelength

11.5cm

11cm

10cm

12cm

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

Vp sin (90° - θ)

All of these

X₀ ω cos θ

Vp cos θ

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

2 λ

3/2 λ

λ/2

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

Maximum in the extreme position

Zero in the mean position

None of these

Constant

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

Becomes one half

Become on fourth

Becomes Double

Remains same

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

4 s

1 s

3 s

2 s

75. 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

Page 4 of 4

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

From extreme position

Means position to upper extreme position

All of these

From means position to back to its means position

77. The kinetic energy is maximum when mass at equilibrium

P.E.max 1.2 KX₀²

P.E.max 1.2 K² X

None of these

P.E.max 1.2 KX²

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

Mass

Force constant

B and C

Amplitude

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

Nine times

Twice

Three times

Four times

80. A simple harmonic motion in which the

Acceleration is directed towards the mean position

All of these

Acceleration produced is due to restoring force

Acceleration is directly proportional to displacement

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

Square of amplitude

4 x amplitude

Amplitude

2 x amplitude

82. A simple pendulum is defined as

Friction less support

Small heavy mass

Light inextensible string

All of these

83. In simple harmonic motion

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 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.

84. Phase of SHM describes

Neither displacement nor direction of motion

Direction of motion only

Both displacement and direction of motion

Displacement only

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

Maximum frequency

None of these

Natural frequency

Minimum frequency

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

8 s

12 s

4 s

16 s

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

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Maan AliLast Updated: April 18, 2025

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ECAT Physics Oscillations Test Online

Physics Oscillations MCQS Online Test

ECAT Physics Oscillations Chapter Online Test

Physics Oscillations Chapter Online Test

Physics

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Physics Oscillations MCQS Online Test

ECAT Physics Oscillations Chapter Online Test

Physics Oscillations Chapter Online Test

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