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Physics Waves Online Mcqs Test

Malik TahirLast Updated: October 13, 2025

Important Waves Question and Answer

Total Questions:	94
Time Allowed:	40 Minutes
Total Marks:	94
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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Physics Waves Practice Test Online With Explanation

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Page 1 of 4

Physics

1. An oscillating mass-spring system generates

None of these

Mechanical waves

Progressive waves

Periodic waves

2. Sound waves do not travel in vacuum because

They do not have enough energy

They are stationary waves

They require material medium for propagation

They are transverse waves

3. If two waves of length 50 cm and 51 cm produced 12 beats per second, the velocity of sound is

331 m/s

340 m/s

306 m/s

360 m/s

4. With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are

Energy and mass

Energy, momentum and mass

Energy and linear momentum

Energy

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

Crossing mean position

Displacement is maximum

At rest

Half way between them

6. The distance between any two consecutive crests or troughs is called

Wave length

Frequency

Period

Phase difference

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)

√k₁k₂

(k₁+k₂)/2

8. Maximum acceleration of an object in simple harmonic motion is 24 m/s² and maximum velocity is 16 m/sec. Then amplitude of SHM is

3/32 m

2/3 m

32/3 m

3/2 m

9. 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

3 s

4 s

1 s

10. For motion of a simple pendulum to be simple harmonic

None of these

Amplitude of motion will be very large

Independent of amplitude of motion

Amplitude of motion will be every small

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

Resonance

Damping

Oscillation

None of these

12. Reflection of radar waves from the aero planes is an example of

Resonance

Interference

Doppler effect

Beat phenomenon

13. A sound source is moving towards stationary listener with 1/10th of the speed of sound. The ratio of apparent to real frequency is

10/9

(11/10)²

(9/10)²

11/10

14. A mass m attached to a spring oscillate every 2 sec. If the mass increases by 2 kg, then time period increases by 1 sec. The initial mass of the body is:

1.6 kg

3.2 kg

12.6 kg

9.6 kg

15. Speed of sound in Water at 20°C is:

1567 ms¯¹

1483 ms¯¹

1343 ms¯¹

1214 ms¯¹

16. A particle executes a simple harmonic motion of time period T. Find the time taken by the particle to go directly from its mean position to half the amplitude

T/2

T/4

T/12

T/8

17. The velocity of sound in air depends upon

Amplitude and frequency of sound

Wavelength of sound

Density and elasticity of gas

Pressure

18. 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

19. In stationary waves

Energy is minimum at nodes and maximum at antinodes

Energy is maximum at nodes and minimum at antidotes

Alternating maximum and minimum energy producing at nodes and antinodes

Energy is uniformly distributed

20. The loudness and pitch of a sound note depends on

Intensity and velocity

Intensity and frequency

Frequency and velocity

Frequency and number of harmonic

21. Which phenomena can be applied to estimate the velocity of star with respect to earth?

Doppler effect

All of these

Interference of waves

Beats phenomena

22. Waves transmit _________ from one place to another

Mass

None of these

Energy

Both

23. One wavelength is the distance covered in a time is called

Time period

Reverberation

Wave

Oscillation Time

24. When two waves with same frequency and constant phase difference interfere.

The energy is redistributed and the distribution remains constant with time

There is a gain of energy

There is a loss of energy

The energy is redistributed and the distribution changes with time

25. When a stationary wave is formed then its frequency is

Same as that of the individual waves

Twice that of the individual waves

Half that of the individual waves

√2 that of the individual waves

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

Quadruple the mass

Reduce the mass to one fourth

Double the mass

Half the mass

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

Decreases

Increases

Becomes Zero

Remains constant

28. When a gas is heated at constant pressure, its volume is increased and its density

Increased rapidly

Decreased

None of these

Increased

29. Waves disturbances may also come in a concentrated bundles like stock waves from an airplane flying at:

None of these

Extra supersonic speed

Sonic speed

Supersonic speed

30. The response of the human ear to the loudness of sound is _________ in nature:

Hyperbolic

Linear

Exponential

Logarithmic

31. 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

32. A pendulum clock that keeps correct time on the Earth is taken to the Moon. It will run

√6 times faster

√6 times slower

6 times faster

At correct rate

33. The distance between two consecutive crests or trough is called

Wavelength

None of these

Amplitude

Frequency

34. The waves moving from a sitar to a listener in air are

Longitudinal stationary

Longitudinal progressive

Transverse progressive

Transverse stationary

35. Silence zone takes place due to

Beats

Resonance

Destructive interference

Constructive interference

36. The speed of sound in a medium depends on

The elastic property as well as the inertia property

The elastic property but not on the inertia property

Neither the elastic property nor the inertia property

The inertia property but not on the elastic property

37. The distance between node and anti-node is

λ/2

2λ

λ/4

38. 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

Decrease

Remain unaffected

Increase

39. Which one of the following statements is true for the speed v and the acceleration α of a particle executing simple harmonic motion?

When v is maximum, α is zero

When v is maximum, α is maximum

Value of α is zero, whatever may be the value of v

When v is zero, α is zero

40. The Doppler effect is produced if

The detector is in motion

None of these

The source is in motion

Both the above

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

3/2 λ

2 λ

λ/2

42. Ultra Violet rays differ X rays in that ultra violet rays

Do not affect photographic plate

Cannot be polarized

Cannot be diffracted

Have a lower frequency

43. A spring-mass system oscillates with a frequency v, if it is taken in an elevator slowly accelerating upward, the frequency will

Increase

Remains same

Become zero

Decrease

44. ‘y’ is the ratio molar specific heat at constant pressure to the molar specific heat at constant volume and has value

1.40

1.26

1.56

1.35

45. Doppler-effect applies to

Both sound and light waves

Neither sound nor light wave

Light wave only

Sound wave only

46. Decibel is unit of

Intensity of light

Energy of radiation

x-ray radiation capacity

Sound loudness

47. Which of the following changes at an antinode is a stationary wave?

Neither pressure nor density

Density only

Both pressure and density

Pressure only

48. The distance between node and antinode is

2λ

λ/2

λ/4

49. Sound waves in air always

Longitudinal

Electromagnetic

Transverse

Stationary

50. For production of beats the two sources must have

Different frequencies, same amplitude and same phase

Different frequencies and same amplitude

Different frequencies and same phase

Different frequencies

Page 3 of 4

51. One spring has force constant 200 Nm¯¹, another has force constant 500 Nm¯¹. If they are joined in series, the force constant will be nearest to

700 Nm¯¹

143 Nm¯¹

100 Nm¯¹

300 Nm¯¹

52. In stationary waves

Alternating maximum and minimum energy producing at nodes and antinodes

Energy is minimum at nodes and maximum at antinodes

Energy is minimum at nodes and maximum at antidotes

Energy is uniformly distributed

53. The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

1 : 4

2 : 1

1 : 2

4 : 1

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

Become one fourth

Remains same

Becomes one half

Becomes double

55. When a body moves in a circle, its projection performs what type of motion?

Rectilinear Motion

Angular Motion

Circular Motion

Simple Harmonic Motion

56. Energy is not carried by

Stationary waves

Transverse progressive waves

Longitudinal vibration

Electromagnetic waves

57. Two particles A and B of equal masses are suspended from two mass less springs of spring constants k₁ and k₂ respectively. If the maximum velocities, during oscillation, are equal, the ratio of amplitudes of A and B is:

√k₁/k₂

k₂/k₁

√k₂/k₁

k₁/k₂

58. In vibratory motion which parameter remains constant?

Angular Momentum

Total Energy

P.E. Energy

K.E. Energy

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

Quality factor is small

Applied periodic force is small

Restoring force is small

Damping force is small

60. When the source of sound moves away form a stationary listener then _________ occurs.

An apparent decrease in frequency

An apparent decrease in wavelength

No apparent change in frequency

An apparent increase in frequency

61. To hear a clear echo, the reflecting surface must be at a minimum distance of

33 m

10 m

16.5 m

66 m

62. The points at which the distance separated by λ, 2λ, 3λ, ........ are

Out of phase

In phase

None of these

Sometimes in phase

63. What sort of waves exhibit the Doppler effect?

All of these

Water waves

Light waves

Sound waves

64. A body with frequency f would complete one vibration in

F seconds

1/T seconds

1 second

1/f seconds

65. Velocity of sound in vacuum is

332 ms-1

224 ms-1

320 ms-1

Zero

66. The gases have a

Smaller elastic modules

Zero elastic modulus

None of these

Large elastic modulus

67. Applications of the results of scientific studies in the designs of buildings etc. is called:

Statics

Optics

Wave mechanics

Acoustics

68. The length of the second’s pendulum on the surface of Earth is 1m. Its length on the surface of moon, where g is 1/6th the value of g on the surface of Earth, is:

6 m

36 m

1/36 m

1/6 m

69. Which one of the following instances are the waves plane-polarized?

Visible light

Gamma rays

Ultra-violet rays

Infra-red radiation

70. What is frequency of radio waves transmitted by a station, if the wavelength of these waves is 300 m?

100000 Hz

10 Hz

1 GHz

1 MHz

71. The length of a spring is ‘α’ when a force of 4N is applied on it. The length is β when 5N force is applied. Then the length of spring when 9N force is applied is

5α – 4β

9 (β – α)

β – α

5 β – 4 α

72. A wave is which the displacement of the wave travel perpendicular to the direction of propagation of waves is called

Longitudinal waves

Transverse wave

Progressive wave

None of these

73. Which one is not produce by sound waves in air?

Diffraction

Reflection

Refraction

Polarization

74. A system under going force vibrations is known as

Frequency harmonic oscillator

Vibration harmonic oscillator

None

Driven harmonic oscillator

75. The waves that require a material medium for their propagation are called

Mechanical waves

Matter waves

Electromagnetic waves

Carrier waves

Page 4 of 4

76. If two waves of amplitude ‘A’ produce a resultant wave of amplitude A, then the phase difference between them will be

120°

180°

60°

90°

77. Velocity of sound in vacuum (in m/s) is

156

1000

330

78. It is possible to distinguish between transverse and longitudinal waves form the property of

Interference

Diffraction

Polarization

Refraction

79. If the period of oscillation of mass m suspended from a spring is one second, then the period of 4 m will be:

¼ sec

½ sec

4 sec

2 sec

80. Beats are the results of

Constrictive and destructive interference

Destructive interference

Polarization

Diffraction of sound waves

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

A hyperbola

An ellipse

A straight line

A circle

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

∞√x

∞ x

∞ x²

Independent of x

83. The velocity of sound is greatest in

Air

Metal

Vacuum

Water

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

Zero in the mean position

Maximum in the extreme position

None of these

Constant

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

λ/2

λ/4

2λ

86. The human ear is most sensitive in the frequency range of:

3,000 to 6,000 Hz

5,000 to 11,000 Hz

2,000 to 4,000 Hz

4,000 to 8,000 Hz

87. If is possible to recognize a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice.

Has a definite quality

Has a definite pitch

Has a definite capacity

Can penetrate the wall

88. Through which character we can distinguish the light waves from sound waves

Refraction

Reflection

Polarization

Interference

89. The beats frequency (sensible) for a human car is

7Hz

256Hz

42Hz

262Hz

90. The velocity of sound in air not affected by changes in:

Temperature of air

Moisture contents in air

The atmospheric pressure

The composition of air

91. Fidelity refers to

Reproduction of music

Reproduction of original sound

Reproduction of a CD from original copy

Reproduction of original image

92. When temperature increases, the frequency of a tuning fork

Increases

Increases or decreases depending on the material

Remains same

Decreases

93. 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 of the vibrating particle are in the same phase

94. When two identical traveling waves are superimposed, the velocity of the resultant wave

Remains unchanged

Becomes zero

Increases

Decreases

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Malik TahirLast Updated: October 13, 2025

5 Comments

Karshma says:

December 17, 2021 at 10:42 am

I am a medical student

Talha Maqsood says:

August 20, 2021 at 12:07 pm

Sir some of your own answer are wrong please correct them

Rana Zunair Mehdi says:

July 21, 2016 at 5:12 pm

Excellent website but there is problem in the answer of a mcqs of physics sample peper no.22. mcqs of “trough” the answer is above the equilibrium position but real answer from tectbook is below the equilibrium position. thanks

1. Talha Maqsood says:
  
  August 20, 2021 at 12:08 pm
  
  Yes bro I have same problem
  
Rana Zunair Mehdi says:

July 21, 2016 at 5:06 pm

Excellent website for preparation of MCAT as it includes all the mcqs from all books . help a lot to obtain higher marks. suuccessfull website

Physics Waves Online Mcqs Test

Important Waves Question and Answer

Physics Waves Practice Test Online With Explanation

Physics

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