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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. 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 quality

Has a definite capacity

Has a definite pitch

2. Energy is not carried by

Transverse progressive waves

Stationary waves

Electromagnetic waves

Longitudinal vibration

3. For production of beats the two sources must have

Different frequencies and same amplitude

Different frequencies, same amplitude and same phase

Different frequencies

Different frequencies and same phase

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

Matter waves

Mechanical waves

Carrier waves

Electromagnetic waves

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

1214 ms¯¹

1483 ms¯¹

1567 ms¯¹

1343 ms¯¹

6. 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

Remain unaffected

Become infinite

Decrease

Increase

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

1 : 4

4 : 1

2 : 1

1 : 2

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

Frequency

Wavelength

None of these

Amplitude

9. Velocity of sound in vacuum is

224 ms-1

Zero

332 ms-1

320 ms-1

10. 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

β – α

9 (β – α)

5 β – 4 α

11. 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/8

T/12

T/4

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

Increases or decreases depending on the material

Increases

Remains same

Decreases

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

∞ x

Independent of x

∞ x²

∞√x

14. Sound waves in air always

Longitudinal

Electromagnetic

Stationary

Transverse

15. 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

300 Nm¯¹

100 Nm¯¹

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

Double the mass

Reduce the mass to one fourth

Quadruple the mass

Half the mass

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

Polarization

Interference

Refraction

Reflection

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

Energy and linear momentum

Energy, momentum and mass

Energy

Energy and mass

19. 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

3 s

4 s

2 s

1 s

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

Amplitude of motion will be very large

None of these

Independent of amplitude of motion

Amplitude of motion will be every small

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

There is a loss of energy

The energy is redistributed and the distribution remains constant with time

There is a gain of energy

The energy is redistributed and the distribution changes with time

22. 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)

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

Wave

Oscillation Time

Reverberation

Time period

24. 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:

12.6 kg

1.6 kg

3.2 kg

9.6 kg

25. Waves transmit _________ from one place to another

None of these

Both

Energy

Mass

Page 2 of 4

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

Beat phenomenon

Resonance

Doppler effect

Interference

27. 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

28. 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 depend on the weight of the boy.

Time period will not change

Time period will increase

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

Sonic speed

Supersonic speed

Extra supersonic speed

None of these

30. 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 velocity and displacement of the vibrating particle are in the same phase

The acceleration of the vibrating particle is ahead of displacement by a phase of π

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

Transverse progressive

Longitudinal progressive

Longitudinal stationary

Transverse stationary

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

None of these

Constant

Maximum in the extreme position

Zero in the mean position

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

Wave length

Frequency

Phase difference

Period

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

F seconds

1/T seconds

1 second

1/f seconds

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

Becomes Zero

Increases

Remains constant

Decreases

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

Circular Motion

Rectilinear Motion

Simple Harmonic Motion

Angular Motion

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

Increased rapidly

None of these

Decreased

Increased

38. 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

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

180°

90°

60°

120°

40. In stationary waves

Energy is minimum at nodes and maximum at antinodes

Energy is uniformly distributed

Alternating maximum and minimum energy producing at nodes and antinodes

Energy is minimum at nodes and maximum at antidotes

41. What sort of waves exhibit the Doppler effect?

Sound waves

Light waves

All of these

Water waves

42. The velocity of sound in air depends upon

Density and elasticity of gas

Pressure

Amplitude and frequency of sound

Wavelength of sound

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

4,000 to 8,000 Hz

2,000 to 4,000 Hz

3,000 to 6,000 Hz

5,000 to 11,000 Hz

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

2λ

λ/2

λ/4

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

Polarization

Reflection

Diffraction

Refraction

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

Decreases

Remains unchanged

Increases

Becomes zero

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

100000 Hz

1 MHz

10 Hz

1 GHz

48. An oscillating mass-spring system generates

None of these

Mechanical waves

Periodic waves

Progressive waves

49. 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

3/32 m

3/2 m

32/3 m

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

66 m

10 m

33 m

16.5 m

Page 3 of 4

51. 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

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

306 m/s

331 m/s

360 m/s

340 m/s

53. 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 increase in frequency

An apparent decrease in frequency

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

Half way between them

At rest

Displacement is maximum

Crossing mean position

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

Longitudinal waves

Progressive wave

None of these

Transverse wave

56. In stationary waves

Energy is maximum at nodes and minimum at antidotes

Energy is uniformly distributed

Energy is minimum at nodes and maximum at antinodes

Alternating maximum and minimum energy producing at nodes and antinodes

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

Same as that of the individual waves

Half that of the individual waves

Twice that of the individual waves

√2 that of the individual waves

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

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

When v is zero, α is zero

When v is maximum, α is maximum

When v is maximum, α is zero

59. 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

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

Both pressure and density

Density only

Pressure only

Neither pressure nor density

61. The gases have a

Zero elastic modulus

None of these

Large elastic modulus

Smaller elastic modules

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

Interference

Diffraction

Polarization

Refraction

63. Silence zone takes place due to

Resonance

Constructive interference

Destructive interference

Beats

64. 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

2 sec

½ sec

¼ sec

65. ‘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

1.40

1.35

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

330

1000

156

67. The velocity of sound is greatest in

Air

Metal

Vacuum

Water

68. A system under going force vibrations is known as

None

Frequency harmonic oscillator

Vibration harmonic oscillator

Driven harmonic oscillator

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

7Hz

42Hz

256Hz

262Hz

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

1 second

π second

4π second

2π second

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

Infra-red radiation

Visible light

Gamma rays

Ultra-violet rays

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

λ/2

3/2 λ

2 λ

73. The distance between node and antinode is

λ/2

2λ

λ/4

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

(9/10)²

10/9

11/10

(11/10)²

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

The atmospheric pressure

Moisture contents in air

The composition of air

Temperature of air

Page 4 of 4

76. The Doppler effect is produced if

None of these

The source is in motion

The detector is in motion

Both the above

77. Fidelity refers to

Reproduction of original image

Reproduction of original sound

Reproduction of a CD from original copy

Reproduction of music

78. 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

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

All of these

Interference of waves

Doppler effect

Beats phenomena

80. Doppler-effect applies to

Neither sound nor light wave

Light wave only

Both sound and light waves

Sound wave only

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

Resonance

None of these

Oscillation

Damping

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

None of these

In phase

Out of phase

Sometimes in phase

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

Do not affect photographic plate

Have a lower frequency

Cannot be diffracted

Cannot be polarized

84. The distance between node and anti-node is

2λ

λ/4

λ/2

85. The speed of sound in a medium depends on

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

The elastic property as well as the inertia property

86. 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:

1/6 m

6 m

1/36 m

36 m

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

Acoustics

Optics

Statics

Wave mechanics

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

Intensity and frequency

Frequency and velocity

Intensity and velocity

Frequency and number of harmonic

89. Beats are the results of

Destructive interference

Constrictive and destructive interference

Polarization

Diffraction of sound waves

90. 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

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

A circle

A hyperbola

An ellipse

A straight line

92. Decibel is unit of

x-ray radiation capacity

Intensity of light

Sound loudness

Energy of radiation

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

Logarithmic

Linear

Exponential

Hyperbolic

94. In vibratory motion which parameter remains constant?

P.E. Energy

K.E. Energy

Total Energy

Angular Momentum

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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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