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.
Test Helpful For:	Physics Test ECAT Test MDCAT Test FPSC/PPSC/SPSC/KPPSC/BPSC/AJKPSC/NTS Physics Interview Question Answer

Physics Waves Practice Test Online With Explanation

Please wait...

Page 1 of 4

Physics

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

2λ

λ/2

λ/4

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

Diffraction

Reflection

Polarization

Refraction

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

Intensity and velocity

Frequency and number of harmonic

Intensity and frequency

Frequency and velocity

4. A system under going force vibrations is known as

Frequency harmonic oscillator

None

Driven harmonic oscillator

Vibration harmonic oscillator

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

1.40

1.56

1.26

1.35

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

√6 times slower

At correct rate

√6 times faster

6 times faster

7. 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

8. Decibel is unit of

Intensity of light

Sound loudness

Energy of radiation

x-ray radiation capacity

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

Logarithmic

Hyperbolic

Linear

Exponential

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

Oscillation Time

Reverberation

Time period

Wave

11. 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

Progressive wave

Transverse wave

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

Wave length

Frequency

Period

Phase difference

13. 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

½ sec

¼ sec

2 sec

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

Wavelength

None of these

Amplitude

Frequency

15. 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

10/9

(9/10)²

(11/10)²

16. 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

1 s

2 s

4 s

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

Interference

Beat phenomenon

Resonance

Doppler effect

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

The composition of air

The atmospheric pressure

Moisture contents in air

Temperature of air

19. Doppler-effect applies to

Light wave only

Sound wave only

Neither sound nor light wave

Both sound and light waves

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

(k₁+k₂)/2

√k₁k₂

k₁+k₂

k₁ k₂/( k₁+k₂)

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

A straight line

An ellipse

A hyperbola

A circle

22. 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, momentum and mass

Energy

23. 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

Decrease

Become infinite

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

Increases

Becomes zero

Remains unchanged

Decreases

25. In simple harmonic motion,

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

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

Page 2 of 4

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

∞√x

∞ x²

∞ x

Independent of x

27. An oscillating mass-spring system generates

Mechanical waves

Periodic waves

Progressive waves

None of these

28. Sound waves do not travel in vacuum because

They are stationary waves

They require material medium for propagation

They do not have enough energy

They are transverse waves

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

Cannot be polarized

Do not affect photographic plate

Have a lower frequency

Cannot be diffracted

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

2,000 to 4,000 Hz

4,000 to 8,000 Hz

5,000 to 11,000 Hz

3,000 to 6,000 Hz

31. 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 increase

Time period will not change

Time period will depend on the weight of the boy.

32. 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

33. Waves transmit _________ from one place to another

Mass

Energy

Both

None of these

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

Becomes Zero

Decreases

Increases

Remains constant

35. The Doppler effect is produced if

Both the above

The detector is in motion

None of these

The source is in motion

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

2π second

1 second

4π second

π second

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

Increase

Decrease

Become zero

Remains same

38. 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

39. Energy is not carried by

Transverse progressive waves

Electromagnetic waves

Stationary waves

Longitudinal vibration

40. 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

k₁/k₂

√k₁/k₂

√k₂/k₁

41. 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 : 2

1 : 4

42. 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

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

At rest

Displacement is maximum

Half way between them

Crossing mean position

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

Matter waves

Electromagnetic waves

Carrier waves

Mechanical waves

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

Becomes one half

Becomes double

Remains same

Become one fourth

46. Fidelity refers to

Reproduction of original sound

Reproduction of a CD from original copy

Reproduction of music

Reproduction of original image

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

An apparent increase in frequency

No apparent change in frequency

An apparent decrease in frequency

An apparent decrease in wavelength

48. 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:

9.6 kg

3.2 kg

1.6 kg

12.6 kg

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

1343 ms¯¹

1567 ms¯¹

1483 ms¯¹

1214 ms¯¹

50. The velocity of sound in air depends upon

Density and elasticity of gas

Amplitude and frequency of sound

Wavelength of sound

Pressure

Page 3 of 4

51. The gases have a

Zero elastic modulus

Smaller elastic modules

Large elastic modulus

None of these

52. Beats are the results of

Destructive interference

Polarization

Diffraction of sound waves

Constrictive and destructive interference

53. 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/2

T/4

T/8

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

Optics

Wave mechanics

Acoustics

Statics

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

Visible light

Infra-red radiation

Gamma rays

Ultra-violet rays

56. Silence zone takes place due to

Resonance

Destructive interference

Beats

Constructive interference

57. 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

36 m

1/36 m

1/6 m

58. 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

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

None of these

Decreased

Increased

Increased rapidly

60. 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

61. The velocity of sound is greatest in

Metal

Vacuum

Water

Air

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

1 second

F seconds

1/T seconds

1/f seconds

63. In vibratory motion which parameter remains constant?

Total Energy

K.E. Energy

Angular Momentum

P.E. Energy

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

Restoring force is small

Quality factor is small

Applied periodic force is small

Damping force is small

65. 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

9 (β – α)

β – α

5 β – 4 α

5α – 4β

66. The speed of sound in a medium depends on

Neither the elastic property nor the inertia property

The elastic property as well as the inertia property

The elastic property but not on the inertia property

The inertia property but not on the elastic property

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

7Hz

42Hz

256Hz

262Hz

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

√2 that of the individual waves

Twice that of the individual waves

Same as that of the individual waves

Half that of the individual waves

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

Transverse progressive

Longitudinal stationary

Longitudinal progressive

Transverse stationary

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

Refraction

Interference

Polarization

Reflection

71. The distance between node and antinode is

λ/4

λ/2

2λ

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

Refraction

Diffraction

Interference

Polarization

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

100000 Hz

10 Hz

1 GHz

1 MHz

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

Angular Motion

Circular Motion

Rectilinear Motion

Simple Harmonic Motion

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

330

1000

156

Page 4 of 4

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

Supersonic speed

Extra supersonic speed

None of these

Sonic speed

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

In phase

Sometimes in phase

Out of phase

None of these

78. 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

Can penetrate the wall

Has a definite capacity

Has a definite pitch

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

10 m

33 m

16.5 m

66 m

80. Sound waves in air always

Transverse

Stationary

Longitudinal

Electromagnetic

81. Velocity of sound in vacuum is

332 ms-1

Zero

320 ms-1

224 ms-1

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

Decreases

Remains same

Increases or decreases depending on the material

Increases

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

Constant

None of these

Zero in the mean position

Maximum in the extreme position

84. 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

85. The distance between node and anti-node is

2λ

λ/4

λ/2

86. 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

2/3 m

3/2 m

87. 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

300 Nm¯¹

100 Nm¯¹

700 Nm¯¹

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

Pressure only

Density only

Neither pressure nor density

Both pressure and density

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

3/2 λ

λ/2

2 λ

90. What sort of waves exhibit the Doppler effect?

Sound waves

All of these

Light waves

Water waves

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

90°

120°

180°

60°

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

Resonance

Damping

None of these

Oscillation

93. In stationary waves

Energy is minimum at nodes and maximum at antinodes

Energy is uniformly distributed

Energy is maximum at nodes and minimum at antidotes

Alternating maximum and minimum energy producing at nodes and antinodes

94. For production of beats the two sources must have

Different frequencies and same phase

Different frequencies

Different frequencies, same amplitude and same phase

Different frequencies and same amplitude

More Related Resources

ECAT Physics Waves 3 MCQS Online Te... Punjab 11th Class Physics Chapter 8... Punjab 10th Class Physics Chapter 1... 10th Class Physics Chapter 1 Simple... KPK 11th Class Physics Chapter 8 Wa... Punjab Physics Online Test 10th Cla... KPK Board 10th Class Physics Ch 1 S... 11th Physics Chapter 8 Waves Short ... Punjab 9th Physics Ch 9 Nature of S... NTS Physics Important Mcqs with Ans...

Can't find what you're looking for? Search below:

Latest Updates

ECAT Physics Waves 3 MCQS Online Test Preparation
Punjab Physics Online Test 10th Class Chapter 1 Simple Harmonic M...
Punjab 9th Physics Ch 9 Nature of Science Short Questions
NTS Physics Important Mcqs with Answers
Physics 10 Class textbook Download Online [ Punjab Board]
PAF Physics Sample Paper Test Online

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

Important Waves Question and Answer

Physics Waves Practice Test Online With Explanation

Physics

More Related Resources

Latest Updates

Malik Tahir

5 Comments

Leave a Reply Cancel reply