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

λ/2

2λ

3/2 λ

2. 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

3. Phase of SHM describes

Displacement only

Both displacement and direction of motion

Direction of motion only

Neither displacement nor direction of motion

4. The damping depends upon

Both

None of these

Sharpness

Amplitude

5. 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

Acceleration, force, total energy

Total energy, amplitude, angular frequency

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

12 s

16 s

8 s

4 s

7. S.I unit of frequency is

Radian

Hertz

Vibration S¯²

ms¯¹

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

λ/2

2 λ

3/2 λ

9. The body oscillates due to a

Restoring force

None of these

Applied force

Frictional force

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

Increases

Remains constant

Decreases

Becomes zero

11. The waves produced in microwave oven have a wavelength

12cm

11cm

10cm

11.5cm

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

1/8

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

Water molecules

Fat molecules

All of these

Both

14. In which case does the potential energy decreases?

On moving a body against gravitational force

On stretching s spring

On compressing a spring

One the rising of an air bubble in water

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

Zero

None of these

Minimum

Maximum

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

Gravity

Tension is string

Drag force of air

None of these

17. In vibratory motion which parameter remains constant?

K.E. Energy

Angular Momentum

P.E. Energy

Total Energy

18. 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 kinetic energy is maximum at the mean position

The acceleration is minimum at the mean position

19. 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.

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

Decreases

Increases

Remain the same

First A then B

21. Restoring force is defined as

F = kx

F = ½ kx

F = ma

F = -kx

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

Strong

Extra ordinarily large

Weak

Feeble

23. The frequency of second pendulum is

2 hertz

1 hertz

0.5 hertz

None of these

24. The restoring force applied on the pendulum

Mg sin θ

-mg sin θ

-mg cos θ

Mg cos θ

25. Oscillatory motion is a type of motion which is

To and fro

All of these

Periodic motions

Vibratory motion

Page 2 of 4

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

2 x amplitude

4 x amplitude

Square of amplitude

Amplitude

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

Angular Motion

Circular Motion

Simple Harmonic Motion

Rectilinear Motion

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

Wavelength of the various bodies

None of these

Amplitudes of the various bodies

29. Frequency is the term used for

Number of vibrations per minute

Time to take one Vibration

None of these

Number of vibration for second

30. 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°.

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

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

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

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

Increases

Remains constant

Decreases

Becomes zero

32. The kinetic energy is maximum when mass at equilibrium

None of these

P.E.max 1.2 KX₀²

P.E.max 1.2 KX²

P.E.max 1.2 K² X

33. 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 length of the pendulum is increased

The mass of the pendulum is decreased

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

Maximum as well minimum

Zero

Minimum only

Maximum only

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

Becomes zero

Remains constant

Decreases

Increases

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

P.E. = ½ KX²

None of these

P.E. = ½ K²X²

P.E. = ½ KX₀²

37. 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

38. The energy of the oscillation comes from the

Starting source

Applied force

None of these

Driving source

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

None of these

V = ω√r² – x²

V = r² – x²

V = √r² – x²

40. The damped oscillations are produced due to

All of these

Frictional support of the system

System friction

Air resistance

41. 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

1 s

2 s

3 s

42. Natural frequency of simple pendulum depends upon

Its length

Its mass

Square root of its length

Square of its length

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

λ/2

2 λ

λ/4

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

10 cm

7.5 cm

15 cm

5 cm

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

Spring

Hand

All of these

Gravity

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

X₀ ω cos θ

Vp sin (90° - θ)

Vp cos θ

All of these

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

½ Kx

½ Kx²

Kx²

48. 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

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

An ellipse

A circle

A hyperbola

A straight line

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

Become on fourth

Becomes one half

Becomes Double

Remains same

Page 3 of 4

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

Quadruple the mass

Double the mass

Half the mass

Reduce the mass to one-fourth

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

Kinetic energy is maximum, potential energy is minimum

Both kinetic and potential energies are minimum

Kinetic energy is minimum, potential energy is maximum

Both kinetic and potential energies are maximum

53. Hook’s law is defined as

None of these

F and X are direct proportional

F and X has no relation

F and X are inverse proportional

54. Forced vibration are known as

Natural vibration

Simple harmonic vibration

Driven harmonic vibration

Free vibration

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

B and C

Amplitude

Force constant

Mass

56. 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

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

∞ x²

∞ √x

∞ x

Independent of x

58. The vibrating bodies produce

All of these

Disturbance

Sound

Waves

59. In vibratory motion

Total energy remain constant

K.E. remain constant

Total momentum remain constant

P.E. remains constant

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

Three times

Twice

Nine times

Four times

61. The waveform of simple harmonic motion will be

Square wave

Sine wave

Saw tooth waveform

None of these

62. 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

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

None

Oscillation

Damping

Resonance

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

Half way between them

At rest

Displacement is maximum

Crossing mean position

65. 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

66. 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

4 s

1 s

67. A simple pendulum is defined as

All of these

Friction less support

Small heavy mass

Light inextensible string

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

69. 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

70. Simple harmonic motion is mathematically represented as

A α – x

V α – x

A α x

F α – x

71. Turning of a radio set is an example of

Free vibration

Musical resonance

Mechanical resonance

Electrical resonance

72. 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 : 4

2 : 1

1 : 2

4 : 1

73. A simple harmonic motion in which the

Acceleration produced is due to restoring force

Acceleration is directed towards the mean position

All of these

Acceleration is directly proportional to displacement

74. 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

Decrease

Remain unaffected

Increase

Become infinite

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

None of these

Free vibrations

Powerful vibration

Forced vibration

Page 4 of 4

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

Half the mass

Double the mass

Reduce the mass to one fourth

Quadruple the mass

77. 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

Wavelength

Time period

Doppler’s effect

Resonance

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

None of these

Maximum in the extreme position

Constant

Zero in the mean position

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

None

Extreme position

Mean position

Both a and b

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

Applied periodic force is small

Restoring force is small

Damping force is small

Quality factor is small

81. In simple harmonic motion

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 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

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

Maximum frequency

Minimum frequency

None of these

Natural frequency

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

Both a and b

Extreme Position

Mean Position

None

84. The relation for the displacement in SHM is

X = X₀ sin ωt

X = X₀ cos (ωt + φ)

X = X₀ cos ωt

None of these

85. 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

86. 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 increase

Time period will not change

Time period will depend on the weight of the boy.

87. 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

Periodic motion

Rotatory motion

Rectilinear motion

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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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