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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. Waves transmit _________ from one place to another

Mass

Energy

Both

None of these

2. The distance between node and anti-node is

λ/4

λ/2

2λ

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

Transverse wave

Progressive wave

Longitudinal waves

None of these

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

The atmospheric pressure

The composition of air

Moisture contents in air

Temperature of air

5. 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/4

T/12

T/8

T/2

6. 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

9.6 kg

12.6 kg

7. Energy is not carried by

Electromagnetic waves

Longitudinal vibration

Transverse progressive waves

Stationary waves

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

330

1000

156

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

1/T seconds

1 second

1/f seconds

F seconds

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

Becomes zero

Decreases

Remains unchanged

Increases

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

√k₁k₂

k₁+k₂

(k₁+k₂)/2

k₁ k₂/( k₁+k₂)

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

4,000 to 8,000 Hz

3,000 to 6,000 Hz

2,000 to 4,000 Hz

5,000 to 11,000 Hz

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

Becomes Zero

Remains constant

Increases

Decreases

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

Becomes double

Become one fourth

Remains same

Becomes one half

15. 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

16. 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

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

66 m

33 m

16.5 m

10 m

18. An oscillating mass-spring system generates

Periodic waves

None of these

Mechanical waves

Progressive waves

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

Damping

Resonance

Oscillation

None of these

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

Quality factor is small

Damping force is small

Restoring force is small

Applied periodic force is small

21. 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

2/3 m

3/2 m

3/32 m

32/3 m

22. In stationary waves

Energy is uniformly distributed

Energy is maximum at nodes and minimum at antidotes

Energy is minimum at nodes and maximum at antinodes

Alternating maximum and minimum energy producing at nodes and antinodes

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

Constant

Maximum in the extreme position

None of these

Zero in the mean position

24. Silence zone takes place due to

Resonance

Destructive interference

Beats

Constructive interference

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

(11/10)²

10/9

11/10

(9/10)²

Page 2 of 4

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

Independent of amplitude of motion

Amplitude of motion will be every small

Amplitude of motion will be very large

None of these

27. The distance between node and antinode is

2λ

λ/4

λ/2

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

λ/2

λ/4

2λ

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

Neither pressure nor density

Pressure only

Both pressure and density

Density only

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

Reflection

Polarization

Refraction

Diffraction

31. Beats are the results of

Constrictive and destructive interference

Diffraction of sound waves

Destructive interference

Polarization

32. 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

β – α

5α – 4β

5 β – 4 α

9 (β – α)

33. What sort of waves exhibit the Doppler effect?

Light waves

Water waves

All of these

Sound waves

34. 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 capacity

Has a definite pitch

Has a definite quality

Can penetrate the wall

35. In vibratory motion which parameter remains constant?

Angular Momentum

P.E. Energy

Total Energy

K.E. Energy

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

Reduce the mass to one fourth

Quadruple the mass

Half the mass

Double the mass

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

At correct rate

√6 times faster

√6 times slower

6 times faster

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

Mechanical waves

Matter waves

Carrier waves

Electromagnetic waves

39. A system under going force vibrations is known as

Vibration harmonic oscillator

Driven harmonic oscillator

Frequency harmonic oscillator

None

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

Half way between them

At rest

Displacement is maximum

Crossing mean position

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

Amplitude

Wavelength

Frequency

None of these

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

360 m/s

306 m/s

340 m/s

331 m/s

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

Frequency and number of harmonic

Intensity and frequency

Intensity and velocity

Frequency and velocity

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

Refraction

Interference

Polarization

Diffraction

45. Sound waves do not travel in vacuum because

They require material medium for propagation

They are stationary waves

They do not have enough energy

They are transverse waves

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

None of these

Increased rapidly

Increased

Decreased

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

Wave length

Phase difference

Frequency

Period

48. 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 increase

Time period will decrease

Time period will not change

49. The velocity of sound is greatest in

Air

Metal

Water

Vacuum

50. 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 zero, α is zero

When v is maximum, α is maximum

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

Page 3 of 4

51. Sound waves in air always

Longitudinal

Transverse

Electromagnetic

Stationary

52. ‘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

53. 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

143 Nm¯¹

700 Nm¯¹

100 Nm¯¹

300 Nm¯¹

54. In simple harmonic motion,

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

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

55. Doppler-effect applies to

Sound wave only

Neither sound nor light wave

Light wave only

Both sound and light waves

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

Linear

Hyperbolic

Logarithmic

Exponential

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

Independent of x

∞ x²

∞ x

∞√x

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

A straight line

An ellipse

A hyperbola

A circle

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

2 sec

¼ sec

½ sec

4 sec

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

Sometimes in phase

None of these

Out of phase

In phase

61. The speed of sound in a medium depends on

Neither the elastic property nor the inertia property

The inertia property but not on the elastic property

The elastic property but not on the inertia property

The elastic property as well as the inertia property

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

No apparent change in frequency

An apparent decrease in wavelength

An apparent decrease in frequency

An apparent increase in frequency

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

Decreases

Increases

Increases or decreases depending on the material

Remains same

64. 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

65. The gases have a

Smaller elastic modules

Zero elastic modulus

Large elastic modulus

None of these

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

Time period

Reverberation

Wave

Oscillation Time

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

Energy, momentum and mass

Energy and linear momentum

Energy and mass

Energy

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

100000 Hz

1 GHz

1 MHz

10 Hz

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

Interference

Refraction

Polarization

Reflection

70. The velocity of sound in air depends upon

Density and elasticity of gas

Wavelength of sound

Pressure

Amplitude and frequency of sound

71. For production of beats the two sources must have

Different frequencies and same phase

Different frequencies, same amplitude and same phase

Different frequencies and same amplitude

Different frequencies

72. The Doppler effect is produced if

Both the above

The detector is in motion

The source is in motion

None of these

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

262Hz

7Hz

42Hz

256Hz

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

Transverse progressive

Longitudinal progressive

Longitudinal stationary

Transverse stationary

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

Wave mechanics

Optics

Acoustics

Statics

Page 4 of 4

76. Decibel is unit of

Energy of radiation

Sound loudness

Intensity of light

x-ray radiation capacity

77. 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

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

λ/2

2 λ

3/2 λ

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

180°

60°

120°

90°

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

Remains same

Become zero

Decrease

Increase

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

Sonic speed

Extra supersonic speed

None of these

Supersonic speed

82. 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

83. Velocity of sound in vacuum is

Zero

320 ms-1

224 ms-1

332 ms-1

84. Fidelity refers to

Reproduction of original sound

Reproduction of a CD from original copy

Reproduction of music

Reproduction of original image

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

Circular Motion

Rectilinear Motion

Angular Motion

Simple Harmonic Motion

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

Same as that of the individual waves

Half that of the individual waves

√2 that of the individual waves

Twice that of the individual waves

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

Doppler effect

Interference

Beat phenomenon

Resonance

88. 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:

36 m

1/36 m

6 m

1/6 m

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

All of these

Doppler effect

Beats phenomena

Interference of waves

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

4 : 1

2 : 1

1 : 2

1 : 4

91. 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

Increase

Remain unaffected

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

Ultra-violet rays

Visible light

Gamma rays

Infra-red radiation

93. In stationary waves

Energy is uniformly distributed

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

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

1214 ms¯¹

1483 ms¯¹

1343 ms¯¹

1567 ms¯¹

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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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