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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. 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

32/3 m

2/3 m

3/32 m

3/2 m

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

None of these

Maximum in the extreme position

Zero in the mean position

Constant

3. Waves transmit _________ from one place to another

None of these

Energy

Both

Mass

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

Circular Motion

Angular Motion

Rectilinear Motion

Simple Harmonic Motion

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

262Hz

256Hz

42Hz

7Hz

6. Doppler-effect applies to

Neither sound nor light wave

Light wave only

Both sound and light waves

Sound wave only

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

Frequency

Phase difference

Wave length

Period

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

Visible light

Ultra-violet rays

Gamma rays

Infra-red radiation

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

10 m

16.5 m

66 m

33 m

10. 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 not change

Time period will decrease

Time period will increase

Time period will depend on the weight of the boy.

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

120°

60°

90°

180°

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

Energy

Energy and linear momentum

Energy and mass

Energy, momentum and mass

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

1 second

1/T seconds

1/f seconds

F seconds

14. Fidelity refers to

Reproduction of original sound

Reproduction of music

Reproduction of original image

Reproduction of a CD from original copy

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

Extra supersonic speed

None of these

Supersonic speed

Sonic speed

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

Increased rapidly

Increased

Decreased

None of these

17. 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

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

Optics

Wave mechanics

Acoustics

Statics

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

∞ x

Independent of x

∞√x

∞ x²

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

Out of phase

In phase

None of these

Sometimes in phase

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

Decreases

Becomes zero

Increases

Remains unchanged

22. In stationary waves

Energy is uniformly distributed

Energy is minimum at nodes and maximum at antinodes

Alternating maximum and minimum energy producing at nodes and antinodes

Energy is minimum at nodes and maximum at antidotes

23. Silence zone takes place due to

Resonance

Beats

Destructive interference

Constructive interference

24. 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

5 β – 4 α

5α – 4β

β – α

9 (β – α)

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

1000

330

156

Page 2 of 4

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

Cannot be diffracted

Cannot be polarized

Do not affect photographic plate

Have a lower frequency

27. 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

Decrease

Become infinite

Remain unaffected

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

None of these

Amplitude

Frequency

Wavelength

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

2 λ

λ/2

3/2 λ

30. Beats are the results of

Diffraction of sound waves

Constrictive and destructive interference

Polarization

Destructive interference

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

Frequency and velocity

Intensity and frequency

Frequency and number of harmonic

Intensity and velocity

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

A straight line

An ellipse

A circle

A hyperbola

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

Become one fourth

Becomes one half

Remains same

Becomes double

34. The distance between node and antinode is

λ/2

2λ

λ/4

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

Linear

Logarithmic

Exponential

Hyperbolic

36. Velocity of sound in vacuum is

332 ms-1

224 ms-1

Zero

320 ms-1

37. 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 maximum, α is zero

When v is maximum, α is maximum

When v is zero, α is zero

38. What sort of waves exhibit the Doppler effect?

Water waves

Sound waves

All of these

Light waves

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

½ sec

¼ sec

2 sec

4 sec

40. An oscillating mass-spring system generates

Progressive waves

Periodic waves

None of these

Mechanical waves

41. The gases have a

None of these

Large elastic modulus

Smaller elastic modules

Zero elastic modulus

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

Reduce the mass to one fourth

Half the mass

Double the mass

Quadruple the mass

43. The Doppler effect is produced if

The source is in motion

Both the above

The detector is in motion

None of these

44. In stationary waves

Alternating maximum and minimum energy producing at nodes and antinodes

Energy is maximum at nodes and minimum at antidotes

Energy is minimum at nodes and maximum at antinodes

Energy is uniformly distributed

45. 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/12

T/8

T/2

T/4

46. 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

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

Electromagnetic waves

Carrier waves

Matter waves

Mechanical waves

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

5,000 to 11,000 Hz

2,000 to 4,000 Hz

3,000 to 6,000 Hz

4,000 to 8,000 Hz

49. 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

1 s

3 s

2 s

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

Transverse stationary

Longitudinal stationary

Transverse progressive

Longitudinal progressive

Page 3 of 4

51. 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

k₁/k₂

k₂/k₁

√k₂/k₁

52. The velocity of sound is greatest in

Water

Air

Metal

Vacuum

53. 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)

(k₁+k₂)/2

√k₁k₂

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

Crossing mean position

Half way between them

At rest

Displacement is maximum

55. Decibel is unit of

x-ray radiation capacity

Sound loudness

Intensity of light

Energy of radiation

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

Beat phenomenon

Resonance

Doppler effect

Interference

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

Decrease

Become zero

Increase

Remains same

58. 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

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

An apparent decrease in wavelength

An apparent increase in frequency

No apparent change in frequency

An apparent decrease in frequency

60. 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

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

Decreases

Increases

Remains same

Increases or decreases depending on the material

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

1 : 2

1 : 4

2 : 1

4 : 1

63. 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 loss of energy

The energy is redistributed and the distribution changes with time

There is a gain of energy

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

6 times faster

At correct rate

√6 times slower

√6 times faster

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

Interference

Refraction

Reflection

Polarization

66. 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

67. Sound waves do not travel in vacuum because

They are transverse waves

They are stationary waves

They require material medium for propagation

They do not have enough energy

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

Interference

Diffraction

Polarization

Refraction

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

Decreases

Becomes Zero

Increases

Remains constant

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

306 m/s

340 m/s

331 m/s

360 m/s

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

2π second

4π second

1 second

π second

72. ‘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

73. 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

100 Nm¯¹

300 Nm¯¹

700 Nm¯¹

74. In vibratory motion which parameter remains constant?

Total Energy

Angular Momentum

K.E. Energy

P.E. Energy

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

Independent of amplitude of motion

None of these

Amplitude of motion will be every small

Amplitude of motion will be very large

Page 4 of 4

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

Twice that of the individual waves

Same as that of the individual waves

Half that of the individual waves

√2 that of the individual waves

77. 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

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

Interference of waves

Doppler effect

Beats phenomena

All of these

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

Wave

Reverberation

Oscillation Time

Time period

80. The velocity of sound in air depends upon

Pressure

Wavelength of sound

Amplitude and frequency of sound

Density and elasticity of gas

81. In simple harmonic motion,

The velocity and acceleration 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 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

82. A system under going force vibrations is known as

None

Driven harmonic oscillator

Vibration harmonic oscillator

Frequency harmonic oscillator

83. The distance between node and anti-node is

λ/4

λ/2

2λ

84. 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 quality

Can penetrate the wall

Has a definite pitch

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

Refraction

Reflection

Diffraction

Polarization

86. Energy is not carried by

Longitudinal vibration

Electromagnetic waves

Transverse progressive waves

Stationary waves

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

Density only

Both pressure and density

Neither pressure nor density

Pressure only

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

λ/2

2λ

λ/4

89. 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

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

Oscillation

None of these

Resonance

Damping

91. Sound waves in air always

Stationary

Electromagnetic

Longitudinal

Transverse

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

1483 ms¯¹

1343 ms¯¹

1567 ms¯¹

1214 ms¯¹

93. For production of beats the two sources must have

Different frequencies, same amplitude and same phase

Different frequencies and same amplitude

Different frequencies

Different frequencies and same phase

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

The atmospheric pressure

Temperature of air

The composition of air

Moisture contents in air

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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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