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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. The velocity of sound is greatest in

Metal

Water

Air

Vacuum

2. The speed of sound in a medium depends on

The elastic property as well as the inertia property

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

3. Energy is not carried by

Transverse progressive waves

Longitudinal vibration

Stationary waves

Electromagnetic waves

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

Diffraction

Interference

Polarization

Refraction

5. In stationary waves

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

Energy is uniformly distributed

6. 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

7. 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

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

None of these

Decreased

Increased rapidly

Increased

9. In vibratory motion which parameter remains constant?

P.E. Energy

Angular Momentum

K.E. Energy

Total Energy

10. The velocity of sound in air depends upon

Density and elasticity of gas

Wavelength of sound

Amplitude and frequency of sound

Pressure

11. Fidelity refers to

Reproduction of original image

Reproduction of music

Reproduction of original sound

Reproduction of a CD from original copy

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

1214 ms¯¹

1567 ms¯¹

1483 ms¯¹

1343 ms¯¹

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

Crossing mean position

At rest

Half way between them

Displacement is maximum

14. The distance between node and antinode is

2λ

λ/2

λ/4

15. 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 maximum

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

When v is maximum, α is zero

When v is zero, α is zero

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

Increases

Becomes Zero

Decreases

Remains constant

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

λ/2

2λ

λ/4

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

4π second

π second

2π second

1 second

19. The Doppler effect is produced if

The detector is in motion

The source is in motion

None of these

Both the above

20. 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

1 s

3 s

4 s

2 s

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

√6 times faster

6 times faster

At correct rate

√6 times slower

22. 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:

3.2 kg

9.6 kg

12.6 kg

1.6 kg

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

Longitudinal progressive

Transverse progressive

Longitudinal stationary

Transverse stationary

24. In simple harmonic motion,

The velocity of the vibrating particle is ahead in phase of the displacement by and angle π

The velocity and displacement of 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

25. Silence zone takes place due to

Beats

Constructive interference

Resonance

Destructive interference

Page 2 of 4

26. 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

k₁/k₂

k₂/k₁

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

Acoustics

Optics

Wave mechanics

Statics

28. 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

100 Nm¯¹

143 Nm¯¹

700 Nm¯¹

300 Nm¯¹

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

In phase

Sometimes in phase

None of these

Out of phase

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

Electromagnetic waves

Carrier waves

Mechanical waves

Matter waves

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

Gamma rays

Infra-red radiation

Ultra-violet rays

Visible light

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

5 β – 4 α

5α – 4β

9 (β – α)

33. Decibel is unit of

Intensity of light

x-ray radiation capacity

Energy of radiation

Sound loudness

34. Sound waves do not travel in vacuum because

They are stationary waves

They are transverse waves

They do not have enough energy

They require material medium for propagation

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

340 m/s

360 m/s

331 m/s

306 m/s

36. Waves transmit _________ from one place to another

Energy

Both

None of these

Mass

37. 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)/2

k₁+k₂

√k₁k₂

38. 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

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

Refraction

Reflection

Polarization

Diffraction

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

42Hz

256Hz

262Hz

7Hz

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

The energy is redistributed and the distribution changes with time

There is a gain of energy

There is a loss of energy

The energy is redistributed and the distribution remains constant with time

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

Transverse wave

Longitudinal waves

None of these

Progressive wave

43. 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 not change

Time period will depend on the weight of the boy.

Time period will increase

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

Half that of the individual waves

√2 that of the individual waves

Twice that of the individual waves

Same as that of the individual waves

45. Sound waves in air always

Longitudinal

Transverse

Stationary

Electromagnetic

46. An oscillating mass-spring system generates

Mechanical waves

Progressive waves

None of these

Periodic waves

47. Beats are the results of

Constrictive and destructive interference

Polarization

Destructive interference

Diffraction of sound waves

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

Restoring force is small

Damping force is small

Applied periodic force is small

Quality factor is small

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

Frequency and velocity

Intensity and velocity

Intensity and frequency

Frequency and number of harmonic

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

4,000 to 8,000 Hz

5,000 to 11,000 Hz

2,000 to 4,000 Hz

3,000 to 6,000 Hz

Page 3 of 4

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

None of these

Sonic speed

Extra supersonic speed

Supersonic speed

52. 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/2

T/8

T/12

53. The gases have a

Smaller elastic modules

None of these

Large elastic modulus

Zero elastic modulus

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

Interference

Refraction

Reflection

Polarization

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

1.26

1.40

1.56

1.35

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

A hyperbola

A circle

An ellipse

A straight line

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

1 : 4

1 : 2

2 : 1

4 : 1

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

None of these

Amplitude

Frequency

Wavelength

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

The composition of air

Temperature of air

Moisture contents in air

The atmospheric pressure

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

∞ x²

∞ x

∞√x

Independent of x

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

Phase difference

Wave length

Frequency

Period

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

Beats phenomena

Interference of waves

All of these

Doppler effect

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

Both pressure and density

Density only

Pressure only

Neither pressure nor density

64. 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°

65. Velocity of sound in vacuum is

Zero

224 ms-1

320 ms-1

332 ms-1

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

Remains same

Increases or decreases depending on the material

Increases

Decreases

67. 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.

Can penetrate the wall

Has a definite pitch

Has a definite capacity

Has a definite quality

68. 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

4 sec

½ sec

2 sec

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

Becomes double

Become one fourth

Becomes one half

Remains same

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

An apparent decrease in wavelength

An apparent decrease in frequency

An apparent increase in frequency

No apparent change in frequency

71. In stationary waves

Energy is minimum at nodes and maximum at antidotes

Alternating maximum and minimum energy producing at nodes and antinodes

Energy is minimum at nodes and maximum at antinodes

Energy is uniformly distributed

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

Wave

Time period

Reverberation

Oscillation Time

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

Logarithmic

Hyperbolic

Exponential

Linear

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

Doppler effect

Interference

Beat phenomenon

Resonance

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

156

330

1000

Page 4 of 4

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

None of these

Oscillation

Resonance

Damping

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

3/2 λ

λ/2

2 λ

78. 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

Increase

Become infinite

Remain unaffected

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

Rectilinear Motion

Circular Motion

Angular Motion

Simple Harmonic Motion

80. 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

(9/10)²

10/9

11/10

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

Cannot be diffracted

Have a lower frequency

Cannot be polarized

Do not affect photographic plate

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

Energy and mass

Energy and linear momentum

Energy

Energy, momentum and mass

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

10 m

66 m

16.5 m

33 m

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

1/f seconds

F seconds

1/T seconds

1 second

85. For production of beats the two sources must have

Different frequencies and same phase

Different frequencies, same amplitude and same phase

Different frequencies

Different frequencies and same amplitude

86. What sort of waves exhibit the Doppler effect?

All of these

Water waves

Light waves

Sound waves

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

Maximum in the extreme position

None of these

Constant

Zero in the mean position

88. Doppler-effect applies to

Light wave only

Neither sound nor light wave

Sound wave only

Both sound and light waves

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

Amplitude of motion will be every small

Amplitude of motion will be very large

None of these

Independent of amplitude of motion

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

Becomes zero

Increases

Remains unchanged

Decreases

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

1 MHz

10 Hz

100000 Hz

1 GHz

92. 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

1/36 m

1/6 m

36 m

93. The distance between node and anti-node is

2λ

λ/2

λ/4

94. A system under going force vibrations is known as

None

Vibration harmonic oscillator

Frequency harmonic oscillator

Driven harmonic oscillator

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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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