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

Wave

Time period

Oscillation Time

Reverberation

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

4 sec

¼ sec

2 sec

½ sec

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

None of these

Maximum in the extreme position

Constant

Zero in the mean position

4. A system under going force vibrations is known as

Frequency harmonic oscillator

Vibration harmonic oscillator

None

Driven harmonic oscillator

5. For production of beats the two sources must have

Different frequencies and same amplitude

Different frequencies and same phase

Different frequencies, same amplitude and same phase

Different frequencies

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

Half way between them

At rest

Crossing mean position

Displacement is maximum

7. An oscillating mass-spring system generates

None of these

Mechanical waves

Progressive waves

Periodic waves

8. The velocity of sound is greatest in

Air

Metal

Vacuum

Water

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

262Hz

256Hz

42Hz

7Hz

10. 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

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

Electromagnetic waves

Matter waves

Carrier waves

Mechanical waves

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

Increased

Decreased

None of these

Increased rapidly

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

3/2 λ

2 λ

λ/2

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

Half the mass

Quadruple the mass

Double the mass

Reduce the mass to one fourth

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

Decreases

Becomes Zero

Increases

Remains constant

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

Increases or decreases depending on the material

Increases

Decreases

Remains same

17. 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

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

Longitudinal stationary

Longitudinal progressive

Transverse stationary

Transverse progressive

19. 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

32/3 m

3/2 m

2/3 m

20. Energy is not carried by

Stationary waves

Transverse progressive waves

Longitudinal vibration

Electromagnetic waves

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

330

156

1000

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

Ultra-violet rays

Visible light

Gamma rays

Infra-red radiation

23. 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

5 β – 4 α

β – α

9 (β – α)

24. In vibratory motion which parameter remains constant?

Angular Momentum

P.E. Energy

Total Energy

K.E. Energy

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

Optics

Statics

Acoustics

Wave mechanics

Page 2 of 4

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

1.56

1.26

1.35

1.40

27. 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

300 Nm¯¹

100 Nm¯¹

28. The distance between node and anti-node is

λ/2

λ/4

2λ

29. 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

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

5,000 to 11,000 Hz

4,000 to 8,000 Hz

2,000 to 4,000 Hz

3,000 to 6,000 Hz

31. Velocity of sound in vacuum is

332 ms-1

Zero

224 ms-1

320 ms-1

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

Interference

Resonance

Beat phenomenon

Doppler effect

33. 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

Increase

Remain unaffected

Become infinite

Decrease

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

∞ x

∞ x²

Independent of x

∞√x

35. Fidelity refers to

Reproduction of original image

Reproduction of a CD from original copy

Reproduction of music

Reproduction of original sound

36. What sort of waves exhibit the Doppler effect?

Water waves

Sound waves

All of these

Light waves

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

There is a gain of energy

There is a loss of energy

The energy is redistributed and the distribution remains constant with time

The energy is redistributed and the distribution changes with time

38. 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

39. 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

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

Angular Motion

Simple Harmonic Motion

Rectilinear Motion

Circular Motion

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

100000 Hz

10 Hz

1 MHz

1 GHz

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

1 second

π second

2π second

4π second

43. 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

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

Applied periodic force is small

Damping force is small

Quality factor is small

Restoring force is small

45. 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 increase

Time period will decrease

Time period will not change

Time period will depend on the weight of the boy.

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

Frequency and number of harmonic

Intensity and velocity

Intensity and frequency

Frequency and velocity

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

Interference

Refraction

Diffraction

Polarization

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

2 : 1

4 : 1

1 : 4

1 : 2

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

Decreases

Increases

Remains unchanged

Becomes zero

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

16.5 m

33 m

10 m

66 m

Page 3 of 4

51. The distance between node and antinode is

2λ

λ/2

λ/4

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

None of these

Frequency

Wavelength

Amplitude

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

Cannot be polarized

Cannot be diffracted

Do not affect photographic plate

Have a lower frequency

54. 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 faster

√6 times slower

55. 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/12

T/8

T/4

56. 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

When v is zero, α is zero

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

When v is maximum, α is zero

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

Extra supersonic speed

Supersonic speed

Sonic speed

None of these

58. The velocity of sound in air depends upon

Pressure

Amplitude and frequency of sound

Wavelength of sound

Density and elasticity of gas

59. 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

60. 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 elastic property but not on the inertia property

The inertia property but not on the elastic property

61. 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

4 s

3 s

1 s

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

Reflection

Refraction

Polarization

Diffraction

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

Both pressure and density

Pressure only

Neither pressure nor density

Density only

64. Beats are the results of

Diffraction of sound waves

Destructive interference

Polarization

Constrictive and destructive interference

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

F seconds

1/f seconds

1/T seconds

1 second

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

60°

120°

90°

180°

67. Silence zone takes place due to

Beats

Destructive interference

Constructive interference

Resonance

68. 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:

√k₂/k₁

k₂/k₁

√k₁/k₂

k₁/k₂

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

None of these

Longitudinal waves

Transverse wave

Progressive wave

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

Exponential

Linear

Logarithmic

Hyperbolic

71. In stationary waves

Energy is uniformly distributed

Energy is maximum at nodes and minimum at antidotes

Alternating maximum and minimum energy producing at nodes and antinodes

Energy is minimum at nodes and maximum at antinodes

72. The gases have a

None of these

Smaller elastic modules

Large elastic modulus

Zero elastic modulus

73. Doppler-effect applies to

Both sound and light waves

Light wave only

Sound wave only

Neither sound nor light wave

74. 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)

k₁+k₂

(k₁+k₂)/2

75. 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

1.6 kg

12.6 kg

9.6 kg

Page 4 of 4

76. In stationary waves

Energy is minimum at nodes and maximum 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

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

Becomes double

Remains same

Become one fourth

Becomes one half

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

1483 ms¯¹

1343 ms¯¹

1214 ms¯¹

1567 ms¯¹

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

Oscillation

None of these

Damping

Resonance

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

In phase

Out of phase

None of these

Sometimes in phase

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

Increase

Become zero

Decrease

Remains same

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

2λ

λ/2

λ/4

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

Refraction

Polarization

Reflection

Interference

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

√2 that of the individual waves

Same as that of the individual waves

Half that of the individual waves

Twice that of the individual waves

85. Sound waves in air always

Transverse

Longitudinal

Electromagnetic

Stationary

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

Temperature of air

The atmospheric pressure

Moisture contents in air

The composition of air

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

A circle

A hyperbola

An ellipse

A straight line

88. Decibel is unit of

Intensity of light

Energy of radiation

Sound loudness

x-ray radiation capacity

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

No apparent change in frequency

An apparent decrease in frequency

An apparent increase in frequency

An apparent decrease in wavelength

90. The Doppler effect is produced if

The detector is in motion

The source is in motion

None of these

Both the above

91. Waves transmit _________ from one place to another

Both

None of these

Energy

Mass

92. Sound waves do not travel in vacuum because

They require material medium for propagation

They do not have enough energy

They are transverse waves

They are stationary waves

93. 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 mass

Energy and linear momentum

Energy

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

Period

Frequency

Phase difference

Wave length

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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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