NEET Foundation Physics Chapter 5 Sound Multiple Choice Questions

by

Chapter 5 Sound Multiple Choice Question And Answers

Direction: Choose the correct option for each questions. There is only one correct response for each question.

Question 1. In SONAR, ______ waves are used.

  1. Ultrasonic
  2. Infrasonic
  3. Radio
  4. Audible sound

Answer. 1. Ultrasonic

Question 2. When we change feeble sound to loud sound we increase its ______.

  1. Velocity
  2. Wavelength
  3. Frequency
  4. Amplitude

Answer. 4. Amplitude

Question 3. Infrasound can be heard by which animal?

  1. Human beings
  2. Rhinoceros
  3. Bat
  4. Dog

Answer. 2. Rhinoceros

Question 4. Sound waves in air are ______.

  1. Radio waves
  2. Electromagnetic waves
  3. Longitudinal waves
  4. Transverse waves

Answer. 3. Longitudinal waves

Read and Learn More NEET Foundation Multiple Choice Questions

Question 5. The unit of quantity on which loudness of sound depends is ______.

  1. Metre
  2. Second
  3. Hertz
  4. m/s

Answer. 1. Metre

Question 6. Sound travels faster in ______.

  1. Solid
  2. Liquid
  3. Gas
  4. None of the above

Answer. 1. Solid

Question 7. S.I. unit of frequency is ______.

  1. Metre
  2. Second
  3. Hertz
  4. m/s

Answer. 3. Hertz

Question 8. The distance between two consecutive crests or two consecutive troughs is called ______.

  1. Velocity
  2. Wavelength
  3. Frequency
  4. Amplitude

Answer. 2. Wavelength

Question 9. ______ is produced with the vibration of objects.

  1. Sound
  2. Wavelength
  3. Frequency
  4. Amplitude

Answer. 1. Sound

Question 10. Sound is the form of ______.

  1. Force
  2. Energy
  3. Heat
  4. Speed

Answer. 2. Energy

Question 11. Which among the following equation is correct?

  1. Wave Velocity = Frequency × Wavelength
  2. Frequency = Wavelength × Wave Velocity
  3. Wave velocity = frequency/wavelength
  4. Wavelength = frequency/wave velocity

Answer. 1. Wave Velocity = Frequency × Wavelength

Question 12. The speed of sound in air is ______ at 0 °C.

  1. 330 m/s
  2. 331 m/s
  3. 332 m/s
  4. 334 m/s

Answer. 2. 331 m/s

Question 13. A sound wave travels from east to west then particles of air will move in ______ direction.

  1. East–West
  2. West–East
  3. North–South
  4. South North

Answer. 1. East–West

Question 14. The frequency ranges for hearing and speaking of dog is ______.

  1. 20 Hz – 20 kHz
  2. 50 Hz – 50 kHz
  3. 60 Hz – 50 kHz
  4. 20 Hz – 50 kHz

Answer. 4. 20 Hz – 50 kHz

Question 15. The frequency of sound above 20 kHz is called ______.

  1. Ultrasound
  2. Infrasound
  3. Ultrasand
  4. Infrasonic

Answer. 1. Ultrasound

Question 16. The minimum distance between the source and the reflector so that the echo is heard is approximately equal to ______ m.

  1. 10
  2. 13
  3. 17
  4. 20

Answer. 3. 17

Question 17. Choose the correct relationship between wave velocity (v), frequency ( f) and wavelength (λ). 

  1. V = fλ
  2. V = f/λ
  3. V = λ/f
  4. V = 1/f λ

Answer. 1. V = fλ

Question 18. Which of the following is not the characteristic of a musical sound?

  1. Quality
  2. Wavelength
  3. Pitch
  4. Loudness

Answer. 2. Wavelength

Question 19. We cannot hear sound on the moon because sound does not travel in ______.

  1. Solid
  2. Liquid
  3. Gas
  4. Vacuum

Answer. 4. Vacuum

Question 20. The physical quantity that oscillates in most waves is ______.

  1. Energy
  2. Mass
  3. Amplitude
  4. Wavelength

Answer. 3. Amplitude

Question 21. ______ remains unchanged when a sound wave travels in air or in water.

  1. Frequency
  2. Amplitude
  3. Wavelength
  4. Speed

Answer. 1. Frequency

Question 22. The frequency which is not audible to the human ear is ______.

  1. 50 Hz
  2. 500 Hz
  3. 5000 Hz
  4. 50000 Hz

Answer. 4. 50000 Hz

Question 23. Sound and light waves both ______.

  1. Have similar wavelength
  2. Follow the law of reflection
  3. Travel through vacuum
  4. Travel as longitudinal waves

Answer. 2. Follow the law of reflection

Question 24. The technique used by bats to find their way or to locate food is ______.

  1. Flapping
  2. SONAR
  3. RADAR
  4. Echolocation

Answer. 4. Echolocation

Question 25. Which among the following is an example of mechanical wave?

  1. Sound wave
  2. Radio wave
  3. Light wave
  4. Infrared wave

Answer. 1. Sound wave

Question 26. Which of the following quantities is transferred during wave propagation?

  1. Speed
  2. Velocity
  3. Acceleration
  4. Energy

Answer. 4. Energy

Question 27. ______ is the unit of wavelength.

  1. Newton
  2. Dyne
  3. Erg
  4. Angstrom

Answer. 4. Angstrom

Question 28. The S.I. unit of time is ______.

  1. Nanosecond
  2. Second
  3. Minute
  4. Hour

Answer. 2. Second

Question 29. The persistence of audible sound due to the successive reflections from the surrounding objects even after the source has stopped to produce that sound is called ______.

  1. Echo
  2. Reflection
  3. Reverberation
  4. Rarefaction

Answer. 3. Reverberation

Question 30. Vibrations inside the ear are amplified by three bones namely the ______ in the middle ear.

  1. auditory bone, anvil and stirrup
  2. hammer, cochlea and stirrup
  3. hammer, anvil and stirrup
  4. hammer, anvil and pinna

Answer. 2. hammer, cochlea and stirrup

Question 31. The ceilings of concert halls and conference halls are made curved because ______.

  1. This way sound waves reaches all the part after reflection from the curved surface
  2. This way sound does not become distorted and confusing
  3. This way reverberation is avoided
  4. All of the Above

Answer. 1. This way sound waves reaches all the part after reflection from the curved surface

Question 32. Note is a sound ______.

  1. of mixture of several frequencies
  2. of mixture of 2 frequencies only
  3. of a single frequency
  4. always unpleasant to listen

Answer. 1. of mixture of several frequencies

Question 33. The vibrations or the pressure variations inside the inner ear are converted into electrical signals by the_____.

  1. Anvil
  2. tympanic membrane
  3. pinna
  4. cochlea

Answer. 4. cochlea

Question 34. The distance between a compression and the next rarefaction of a longitudinal wave is ______.

  1. λ
  2. λ/2
  3. λ/4
  4. λ/8

Answer. 2. λ/2

Question 35. When feeble sound is changed to loud sound, we increase its ______.

  1. Frequency
  2. Speed
  3. Amplitude
  4. Velocity

Answer. 3. Amplitude

Question 36. The speed of sound in a gas is not affected by the change in

  1. Wavelength of wave
  2. Amplitude of wave
  3. Pressure
  4. Speed

Answer.

  1. Wavelength of wave
  2. Amplitude of wave
  3. Pressure

Question 37. The speed of sound in a medium depends on ______.

  1. Time
  2. Volume
  3. Elasticity
  4. Density

Answer.

3. Elasticity

4. Density

Question 38. Sound can travel through ______.

  1. Solid
  2. Liquid
  3. Gas
  4. Vacuum

Answer. 

  1. Solid
  2. Liquid
  3. Gas

Question 39. Choose the correct statement

  1. The time taken for one complete oscillation in the density of the medium is called the time period of the sound wave.
  2. The amplitude of sound wave is the height of the crest or tough.
  3. With high frequency, sound has high pitch
  4. When frequency is low, sound has low pitch

Answer.

  1. The time taken for one complete oscillation in the density of the medium is called the time period of the sound wave.
  2. The amplitude of sound wave is the height of the crest or tough.
  3. With high frequency, sound has high pitch
  4. When frequency is low, sound has low pitch

Question 40. Choose the correct statement

  1. If amplitude is bigger, sound is soft.
  2. If amplitude is smaller, sound is loud.
  3. If amplitude is bigger, sound is loud.
  4. If amplitude is smaller, sound is soft.

Answer. 

3. If amplitude is bigger, sound is loud.
4. If amplitude is smaller, sound is soft.

Question 41. Light can travel through ______.

  1. Solid
  2. Liquid
  3. Gas
  4. Vacuum

Answer. 

  1. Solid
  2. Liquid
  3. Gas
  4. Vacuum

Question 42. Choose the correct unit.

  1. The S.I. unit of frequency is Hertz.
  2. The S.I. unit of wavelength is metre.
  3. The S.I. unit of time is hour.
  4. The S.I. unit of time is second.

Answer. 

1. The S.I. unit of frequency is Hertz.
2.The S.I. unit of wavelength is metre
4. The S.I. unit of time is second.

Question 43. Choose the incorrect statement

  1. The pitch of sound depends on the frequency of vibration.
  2. The pitch of sound depends on the amplitude of vibration.
  3. The loudness of sound depends upon the amplitude of vibration.
  4. The loudness of sound depends upon the frequency of vibration.

Answer. 

2. The pitch of sound depends on the amplitude of vibration.
4. The loudness of sound depends upon the frequency of vibration.

Question 44. Choose the correct statement

  1. Speed of sound in Glass at 25 °C is 3980 m/s.
  2. Speed of sound in Oxygen at 25 °C is 390 m/s.
  3. Speed of sound in Steel at 25 °C is 5960 m/s.
  4. Speed of sound in Hydrogen at 25 °C is 1284 m/s.

Answer. 

1. Speed of sound in Glass at 25 °C is 3980 m/s.
3. Speed of sound in Steel at 25 °C is 5960 m/s.
4. Speed of sound in Hydrogen at 25 °C is 1284 m/s.

Question 45. Choose the incorrect speed of sound in air.

  1. 344 m/s
  2. 355 m/s
  3. 366 m/s
  4. 377 m/s

Answer. 

2. 355 m/s
3. 366 m/s
4. 377 m/s

Question 46. For hearing an echo, the minimum distance should be:

  1. less than 10 m
  2. between 10 m and 15 m
  3. 17 m or more
  4. none of the above

Answer. 3. 17 m or more

Question 47. The quantities that a travelling wave carry with it are

  1. mass
  2. velocity
  3. wavelength
  4. energy

Answer. 4. energy

Question 48. Sonar works on the principle of

  1. reflection of sound waves
  2. momentum of sound waves
  3. energy of sound waves
  4. refraction of sound waves

Answer. 1. reflection of sound waves

Question 49. When a wave goes from one medium to another medium, which quantity does not changes?

  1. frequency
  2. wavelength
  3. velocity
  4. time period

Answer. 1. frequency

Question 50. Hearing of repetition of sound after reflection from a distant object is called:

  1. reverberation
  2. resonance
  3. echo
  4. none of these

Answer. 3. echo

Question 51. Which of the following sound waves can not be heard by human?

  1. 20 Hz
  2. 500 Hz
  3. 15 Hz
  4. 1500 Hz

Answer. 3. 15 Hz

Question 52. A boy sitting in a boat fires a gun. An observer P is at a distance of 50 m from the boat. Another observer Q is a diver, who is 50 m under water. Both hear the sound of gun:

  1. P hears the sound first
  2. Q hears the sound first
  3. both P and Q hear the sound
  4. none of the above

Answer. 2. Q hears the sound first

Question 53. Mechanical waves on the surface of a ­liquid are:

  1. transverse
  2. longitudinal
  3. torsional
  4. both transverse and longitudinal (or ripples)

Answer. 4. both transverse and longitudinal (or ripples)

Question 54. Ultrasonic waves are those waves:

  1. which a man can hear
  2. which a man cannot hear
  3. which are of high velocity
  4. which have high amplitude

Answer. 2. which a man cannot hear

Question 55. If the amplitude of waves at a distance r from a point source is A, the amplitude at a distance 2r will be:

  1. 2A
  2. A
  3. A/2
  4. A/4

Answer. 3. A/2

Question 56. Sound travels in air as:

  1. longitudinal waves
  2. transverse waves
  3. torsional waves
  4. electromagnetic waves

Answer. 1. longitudinal waves

Question 57. For the wave shown in figure, the frequency and wavelength, if its speed is 320 m/sec, are

NEET Foundation Physics Sound Question 57

  1. 8 cm, 400 Hz
  2. 80 cm, 40 Hz
  3. 8 cm, 4000 Hz
  4. 40 cm, 8000 Hz

Answer. 3. 8 cm, 4000 Hz

Question 58. With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the direction of propagation are

  1. energy, momentum and mass
  2. energy
  3. energy and mass
  4. energy and linear momentum

Answer. 4. energy and linear momentum

Question 59. Light can travel in vacuum but no sound, because:

  1. speed of sound is very much slower than light
  2. light waves are electromagnetic in nature
  3. sound waves are electromagnetic in nature
  4. light waves are not electromagnetic in nature

Answer. 2. light waves are electromagnetic in nature

Question 60. Sound energy is basically:

  1. mechanical energy
  2. electromagnetic energy
  3. potential energy
  4. electrical energy

Answer. 1. mechanical energy

Question 61. The transfer of energy in a material medium due to the periodic motion of its particle is called:

  1. wave front
  2. wave motion
  3. pulse
  4. none of these

Answer. 2. wave motion

Question 62. The sound waves in a medium are characterised by the:

  1. linear motion of particles in the medium
  2. rotatory motion of particles in the medium
  3. oscillatory motion of particles in the medium
  4. none of the above

Answer. 3. oscillatory motion of particles in the medium

Question 63. The sound waves which travel in the air are called:

  1. transverse waves
  2. longitudinal waves
  3. polarised waves
  4. none of the above

Answer. 2. longitudinal waves

Question 64. In case of transverse waves the particles of a medium vibrate:

  1. in the direction of wave propagation
  2. opposite to the direction of wave propagation
  3. at right angles to the direction of wave propagation
  4. none of the above

Answer. 3. at right angles to the direction of wave propagation

Question 65. A sonic boom is produced in the air when an aircraft flies at a speed:

  1. equal to the speed of sound
  2. more than the speed of sound
  3. less than the speed of sound
  4. climbs vertically

Answer. 2. more than the speed of sound

Question 66. The animal which cannot hear ultrasonic waves is:

  1. bat
  2. cow
  3. dog
  4. dolphin

Answer. 2. cow

Question 67. A longitudinal wave consists of:

  1. crest and troughs in the medium
  2. compressions and rarefactions in the medium
  3. both (a) and (b)
  4. neither (a), nor (b)

Answer. 2. compressions and rarefactions in the medium

Question 68. The transverse waves can propagate only in:

  1. liquids
  2. gases
  3. solids
  4. vacuum

Answer. 3. solids

Question 69. In the compression region of the medium in case of longitudinal wave:

  1. the volume momentarily decreases
  2. the density momentarily increases
  3. the pressure momentarily increases
  4. all of the above

Answer. 4. all of the above

Question 70. A part of longitudinal wave in which particles of medium are farther away than the normal particles is called:

  1. rarefaction
  2. trough
  3. compression
  4. crest

Answer. 1. rarefaction

Question 71. A slinky can produce in laboratory:

  1. transverse waves only
  2. longitudinal waves only
  3. both (a) and (b)
  4. none of the above

Answer. 3. both (a) and (b)

Question 72. In case of transverse wave:

  1. the hump on the –y axis is called trough
  2. the lowest point the hump on the –y axis is called trough
  3. the hump on +y axis is called trough
  4. the highest point on the hump on the +y axis is called trough

Answer. 2. the lowest point the hump on the -y axis is called trough

Question 73. The wavelength is the linear distance between the:

  1. two consecutive compressions
  2. two consecutive rarefactions
  3. one compression and one rarefaction
  4. both (a) and (b)

Answer. 4. both (a) and (b)

Question 74. The change in density/pressure of a medium from maximum value to minimum value and again to maximum value, due to the propagation of a longitudinal wave is called complete:

  1. oscillation
  2. frequency
  3. amplitude
  4. none of these

Answer. 1. oscillation

Question 75. The number of oscillations passing through a point in unit time is called:

  1. vibration
  2. frequency
  3. wavelength
  4. none of these

Answer. 2. frequency

Question 76. The bat hunts it prey by emitting and receiving reflected:

  1. super sonic waves
  2. ultrasonic waves
  3. sonic waves
  4. infrasonic waves

Answer. 2. ultrasonic waves

Question 77. The SI unit of frequency is

  1. hertz
  2. gauss
  3. decibel
  4. none of these

Answer. 1. hertz

Question 78. If the frequency of a wave is 25 Hz, the total number of compression and rarefactions passing through a point in 1 second is

  1. 25
  2. 50
  3. 100
  4. none of these

Answer. 2. 50

Question 79. Amplitude of a longitudinal wave in the medium

  1. is the extent to which a medium gets compressed
  2. is the extent to which a medium gets rarefied
  3. is the extent to which a medium gets rarefied
  4. none of the above

Answer. 3. is the extent to which a medium gets rarefied

Question 80. The linear distance between a compression and a rarefaction or a crest and a trough is:

  1. \(\frac{\lambda}{2}\)
  2. \(\frac{\lambda}{4}\)
  3. 1
  4. \(\frac{3 \lambda}{2}\)

Answer. 1. \(\frac{\lambda}{2}\)

Question 81. A stretched string is plucked gently to produce a note. The string is producing:

  1. longitudinal waves
  2. stationary waves
  3. transverse waves
  4. both (a) and (c)

Answer. 3. transverse waves

Question 82. A stretched slinky is given a sharp push along its length. A wave travels from one end to another. The wave so produced is:

  1. transverse wave
  2. longitudinal wave
  3. stationary wave
  4. none of these

Answer. 2. longitudinal wave

Question 83. A longitudinal sound wave in air consists:

  1. a number of rarefaction pulses one after the other
  2. a number of compression pulses one after the other
  3. compression and rarefaction pulses alternating with each other
  4. a rarefaction pulse followed by compression pulse, separated by some distance

Answer. 3. compression and rarefaction pulses alternating with each other

Question 84. Infrasonic vibrations have frequency:

  1. less than 10 Hz
  2. less than 20 Hz
  3. between 20 and 20,000 Hz
  4. more than 20,000 Hz

Answer. 2. less than 20 Hz

Question 85. The range of sonic waves is between:

  1. 20 Hz to 2000 Hz
  2. 20 Hz to 10,000 Hz
  3. 20 Hz to 15,000 Hz
  4. 20 Hz to 20,000 Hz

Answer. 4. 20 Hz to 20,000 Hz

Question 86. When a vibrating object moves backwards, it creates a region of low pressure called ______.

  1. Reflection
  2. Rarefaction
  3. Wavelength
  4. Frequency

Answer. 2. Rarefaction

Question 87. The distance travelled by a wave in one second is called its ______.

  1. Wave velocity
  2. amplitude
  3. Wavelength
  4. Frequency

Answer. 1. Wave velocity

Question 88. The unit of wave velocity is ______.

  1. m
  2. s
  3. m/s
  4. km

Answer. 3. m/s

Question 89. Choose the correct equation

  1. Wavelength = wave velocity/time period
  2. Wavelength = wave velocity × time period
  3. Wave velocity = wavelength × time period
  4. Wavelength = wave velocity

Answer. 2. Wavelength = wave velocity/time period

Question 90. Sound cannot travel in ______.

  1. Solid
  2. Liquid
  3. Gas
  4. Vacuum

Answer. 4. Vacuum

Question 91. ______ is an instrument used by doctors for listening breaths.

  1.  Radar
  2. Stethoscope
  3. Soundboard
  4. Loudspeaker

Answer. 2. Stethoscope

Question 92. Soundboard works on the basis of law of ______ of sound waves.

  1. Reflection
  2. Rarefaction
  3. Newton
  4. None of the above

Answer. 1. Reflection

Question 93. The sound that comes to our ear after reflection is called ______.

  1. Reflection
  2. Infrared
  3. Ultrasound
  4. Echo

Answer. 4. Echo

Question 94. The speed of sound in a gas is not affected by the change in ______.

  1. Distance
  2. Time
  3. Pressure
  4. Speed

Answer. 3. Pressure

Question 95. The speed of sound in a gas increases with the increase in the ______ of gas.

  1. Speed
  2. Density
  3. Temperature
  4. None of the above

Answer. 3. Temperature

Question 96. ______ is used to detect and find the distance of objects under water.

  1. Ultrasonography
  2. Sonar
  3. Radiology
  4. Chronology

Answer. 2. Sonar

Question 97. The energy carried by ultrasound is very ______.

  1. High
  2. Low
  3. Medium
  4. None of the above

Answer. 1. High

Question 98. The frequency range of hearing for human is ______.

  1. 20 Hz – 20 kHz
  2. 30 Hz – 30 kHz
  3. 40 Hz – 40 kHz
  4. 50 Hz – 50 kHz

Answer. 1. 20 Hz – 20 kHz

Question 99. The sound of frequency less than 20 Hz is known as ______.

  1. Ultrasound
  2. Infrasonic
  3. Rarefaction
  4. Reflection

Answer. 2. Infrasonic

Question 100. The sound of frequency greater than 20 kHz is known as ______.

  1. Ultrasound
  2. Infrasonic
  3. Rarefaction
  4. Reflection

Answer. 1. Ultrasound

Leave a Comment