sound mcqs

Sound Class MCQs Questions with Answers

Choose the correct option.

Question 1.
The voice box is also called as
(a) stomach
(b) heart
(c) larynx
(d) mouth

Question 2.
Sound is a kind of
(a) work
(b) energy
(c) force
(d) pressure

Question 3.
The hearing range of human ear is
(a) 20 Hz to 20,000 Hz
(b) less than 20 Hz
(c) more than 20,000 Hz
(d) 20 Hz to 25,000 Hz

Question 4.
Pitch of sound is determined by its
(a) frequency
(b) speed
(c) amplitude
(d) loudness

Question 5.
The frequency of subsonic sound is
(a) more than 20 Hz
(b) 100 Hz
(c) less than 20 Hz
(d) more than 20,000 Hz

Question 6.
Cochlea is a part of
(a) hearing organ
(b) sound producing organ
(c) muscular organ
(d) air pollution

Question 7.
1 hertz is equal to
(a) 1 vibration per minute
(b) 10 vibrations per minute
(c) 60 vibrations per minute
(d) 600 vibrations per minute

Question 8.
Sound cannot travel through
(a) air
(b) water
(c) air
(d) vacuum

Question 9.
The sound in the audible range is called
(a) ultrasonic sound
(b) sonic sound
(c) subonic sound
(d) light sound

Question 10.
Speed is
(a) DistancetravelledTime
(b) TimeDistancetravelled
(c) Distance travelled × Time
(d) Time + Distance travelled

Question 11.
A pendulum oscillates 20 times in 4 seconds. Find its time period.
(a) 0.05 sec.
(b) 0.001 sec.
(c) 0.2 sec.
(d) 0.1 sec

Question 12.
Loudness of sound is determined by
(a) pitch
(b) frequency
(c) amplitude
(d) time period

Question 13.
The number of vibrations made by a vibrating body in one second is
(a) frequency
(b) noise
(c) loudness
(d) pitch

Question 14.
The maximum displacement of a body from its mean position is called
(a) amplitude
(b) oscillation
(c) periodic motion
(d) frequency

Question 15.
The velocity of sound at 20°C is approximately
(a) 3400 m/sec.
(b) 340 m/sec.
(c) 430 m/sec
(d) 304 m/sec.

Question 16.
Sound is produced by
(a) Non-Vibrating objects only
(b) Vibrating and non- vibrating objects
(c) Vibration has no relation to sound
(d) Vibrating objects only

Question 17.
Sound cannot travel through
(a) vacuum
(b) air
(c) water
(d) solids

Question 18.
Vibration is also known as
(a) Vibratory motion
(b) Translatory motion
(c) Oscillatory motion
(d)  None of these

Question 19.
Frequency is expressed in
(a) Kilometer
(b) Hertz
(c) gram
(d) Degree

Question 20.
The number of oscillations per second is called
(a) Amplitude of oscillation
(b) Pitch of oscillation
(c) Frequency of oscillation
(d) None of the above

Question 21.
Above _____ dB the sound becomes physically painful
(a) 60
(b) 40
(c) 120
(d) 80

Question 22.
When the amplitude of vibration is large, sound produced is
(a)  No sound
(b) feeble
(c) loud
(d) No relation between amplitude and sound

Question 23.
Human can hear sound in the range of
(a) 200-2000 Hz
(b) 20-20,000 Hz
(c)  2-20000 Hz
(d) 2000-200000 Hz

Question 24.
An ultrasound equipment works at frequency
(a) Higher than 20,000 Hz
(b) Higher than 10,000 Hz
(c) Lower than 20,000 Hz
(d) Lower than 10,000 Hz

Question 25.
Voice of man is heavy compared to a woman because
(a) Female vocal cord is longer
(b) Male vocal cord is shorter
(c) Male vocal cord is longer
(d) The concept is not related

26. human beings sound is produced by __________.

27 Sound of frequency lower than 20 Hz is called the __________.

28. The __________ nerve is also present in the inner ear.

29. Sounds which are unpleasant to the ear is called __________.

30. Too much noise in our surroundings that causes discomfort is called __________.

31. The speed of sound is maximum in __________.

32. Sounds of frequencies higher than 20,000 Hz are called the __________ sound.

33. __________ is the time taken by a vibrating body for one complete vibration.

34. Above __________ the noise becomes physically painful.

35. Plantation on the roadside can reduce __________.

36.. The hearing range of human ears is __________.

37. The loudness of normal breathing of human is __________.

38. Vibration is a repeated __________ and __________ motion.

39. The loudness of sound is determined by the __________ of vibration.

40.The human voice box is called _________

41. All human beings can hear sounds of frequencies upto 60,000 Hz.

42. The sound in a sitar is produced by plucking its strings.

43. Sound cannot travel through vacuum.

44. Sound does not need a medium for its propagation.

45. The loudness is expressed in a unit called decibel.

46. Loud sounds have high frequencies.

47. Sound travel faster in air, slower in iron.

48. Light travels much faster than sound.

49. Man cannot hear sound of bats.

50. The time taken to complete one oscillation is called frequency.

51. Shriller sound has more frequency.

52. Tabla is a musical instrument.

53. The sound could not travel in solid.

54. The pitch of a sound depends in the frequency of the waves.

55.  Eardrum is a part of

      a.  Sound producing organ

      b.  Skeletal system

      c.  Hearing organ

      d.  Reproductive organ

56.  The hearing range of human ear is

      a.  20 Hz to 20,000 Hz

      b.  Less than20 Hz

      c.  More than 20,000 Hz

      d.  20 Hz to 25,000 Hz

57.   The voice box is called:

      a.  Stomach

      b.  Heart

      c.  Larynx

      d.  Mouth

58.   Large amplitude of sound vibrations will produce:

      a.  Loud sound

      b.  Meak sound

      c.  Slow sound

      d.  Shreak

59.   The pitch of sound depends on

      a.  frequency

      b.  amplitude

      c.  both of these

      d.  none of these

60.   Sound is kind of

      a.  Work

      b.  Energy

      c.  Force

      d.  None

61.   To an fro motion of an object is called

      a.  Waves

      b.  Amplitude

      c.  Vibration

      d.  All of the above

63.   Voice box or larynx of human process

      a.  Sound

      b.  Wind

      c.  Loudness

      d.  None

64.   Sound propagates maximum in

      a.  Gas

      b.  Liquid

      c.  Solid

      d.  All

65.   Noise pollution is harmful for

      a.  Human

      b.  Cat

      c.  Bird

      d.  All

66.list of mediums is given below.

(i) wood

(ii) water

(iii) air

(iv) vacuum

In which of these mediums can sound travel?

(a) i & ii only

(b) i, ii & iii only

(c) iii & iv only

(d) ii, iii & iv only

67. The loudness of a sound depends on:

(a) its amplitude.

(b) its frequency.

(c) its time period.

(d) its speed.

68. Which of the following statements are correct?

(i) Sound is produced by vibrations.

(ii) Sound requires a medium for propagation.

(iii) Light and sound both require a medium for propagation.

(iv) Sound travels slower than light.

(a) i & ii only

(b) i, ii & iii only

(c) ii, iii & iv only

(d) i, ii & iv only

69. An object is vibrating at 50 hertz. What is its time period?

(a) 0.02 s

(b) 2 s

(c) 0.2 s

(d) 20.0 s

70. In order to reduce the loudness of a sound, we have to

(a) decrease its frequency of vibration of the sound.

(b) increase its frequency of vibration of the sound.

(c) decrease its amplitude of vibration of the sound.

(d) increase its amplitude of vibration of the sound

71. The loudness of sound is measured in units of

(a) Decibel (dB)

(b) Hertz (Hz)

(c) Metre (m)

(d) Metre/Second (m/s)

72. The loudness of sound is determined by the

(a) amplitude of vibration

(b) the ratio of amplitude and frequency of vibration

(c) frequency of vibration

(d) product of amplitude and frequency of vibration

73. 1 hertz is equal to

(a) 1 vibration per minute

(b) 10 vibrations per minute

(c) 60 vibrations per minute

(d) 600 vibrations per minute

74. Pitch of sound is determined by its

(a) frequency

(b) amplitude

(c) speed

(d) loudness

75. Ultrasound has a frequency of vibration

(a) between 20 and 20,000 Hz

(b) below 20 Hz

(c) above 20,000 Hz

(d) between 500 and 10,000 Hz

76. Lightning can be seen as the moment it occurs. Paheli observes lightning in her area. She hears the sound 5 s after she observed lightning. How far is she from the place where lightning occurs? (speed of sound = 340)

77. Does any part of our body vibrate when we speak? Name the part.

78. Boojho saw a cracker burst at night at a distance from his house. He heard the sound of the cracker a little later after seeing the cracker burst. Give the reason for the delay in hearing the sound.

79. When we hear a sound, does any part of our body vibrate? Name the part

80  Name two musical instruments which produce sound by vibrating strings?

81. A simple pendulum makes 10 oscillations in 20 seconds. What is the time period and frequency of its oscillation?

82. We have learnt that vibration is necessary for producing sound. Explain why the sound produced by every vibrating body cannot be

83.The voice box is also called as
(a) stomach
(b) heart
(c) larynx
(d) mouth

84Sound is a kind of
(a) work
(b) energy
(c) force
(d) pressure

85.The hearing range of human ear is
(a) 20 Hz to 20,000 Hz
(b) less than 20 Hz
(c) more than 20,000 Hz
(d) 20 Hz to 25,000 Hz

86.Pitch of sound is determined by its
(a) frequency
(b) speed
(c) amplitude
(d) loudness

87.The frequency of subsonic sound is
(a) more than 20 Hz
(b) 100 Hz
(c) less than 20 Hz
(d) more than 20,000 Hz

88.Cochlea is a part of
(a) hearing organ
(b) sound producing organ
(c) muscular organ
(d) air pollution

89.1 hertz is equal to
(a) 1 vibration per minute
(b) 10 vibrations per minute
(c) 60 vibrations per minute
(d) 600 vibrations per minute

90.Sound cannot travel through
(a) air
(b) water
(c) air
(d) vacuum

91.The sound in the audible range is called
(a) ultrasonic sound
(b) sonic sound
(c) subonic sound
(d) light sound

92.Speed is
(a) DistancetravelledTime
(b) TimeDistancetravelled
(c) Distance travelled × Time
(d) Time + Distance travelled

93.A pendulum oscillates 20 times in 4 seconds. Find its time period.
(a) 0.05 sec.
(b) 0.001 sec.
(c) 0.2 sec.
(d) 0.1 sec

94.Loudness of sound is determined by
(a) pitch
(b) frequency
(c) amplitude
(d) time period

95.The number of vibrations made by a vibrating body in one second is
(a) frequency
(b) noise
(c) loudness
(d) pitch

96.The maximum displacement of a body from its mean position is called
(a) amplitude
(b) oscillation
(c) periodic motion
(d) vibration

97.The velocity of sound at 20°C is approximately
(a) 3400 m/sec.
(b) 340 m/sec.
(c) 430 m/sec
(d) 304 m/sec

98.Sound is produced by
(a) Non-Vibrating objects only
(b) Vibrating and non- vibrating objects
(c) Vibration has no relation to sound
(d) Vibrating objects only

99.Sound cannot travel through
(a) vacuum
(b) air
(c) water
(d) solid

100.Vibration is also known as
(a) Vibratory motion
(b) Translatory motion
(c) Oscillatory motion
(d)  None of these

101.Frequency is expressed in
(a) Kilometer
(b) Hertz
(c) gram
(d) Degree centigrad

102.The number of oscillations per second is called
(a) Amplitude of oscillation
(b) Pitch of oscillation
(c) Frequency of oscillation
(d) None of the above

103.Above _____ dB the sound becomes physically painful
(a) 60
(b) 40
(c) 120
(d) 80

104.When the amplitude of vibration is large, sound produced is
(a)  No sound
(b) feeble
(c) loud
(d) No relation between amplitude and sound

105.Human can hear sound in the range of
(a) 200-2000 Hz
(b) 20-20,000 Hz
(c)  2-20000 Hz
(d) 2000-200000 Hz

106.An ultrasound equipment works at frequency
(a) Higher than 20,000 Hz
(b) Higher than 10,000 Hz
(c) Lower than 20,000 Hz
(d) Lower than 10,000 Hz

107.Voice of man is heavy compared to a woman because
(a) Female vocal cord is longer
(b) Male vocal cord is shorter
(c) Male vocal cord is longer
(d) The concept is not related

108. human beings sound is produced by __________

108. Sound of frequency lower than 20 Hz is called the __________.

109. The __________ nerve is also present in the inner ear.

110. Sounds which are unpleasant to the ear is called __________

111. Too much noise in our surroundings that causes discomfort is called __________

112. The speed of sound is maximum in __________

113. Sounds of frequencies higher than 20,000 Hz are called the __________ sound.

114.__________ is the time taken by a vibrating body for one complete vibration.

115.Above __________ the noise becomes physically painful.

116. Plantation on the roadside can reduce __________.

Answer

117. The hearing range of human ears is __________.

Answer

118. The loudness of normal breathing of human is __________.

Answer

119. Vibration is a repeated __________ and __________ motion.

Answer

120. The loudness of sound is determined by the __________ of vibration.

121. The human voice box is called __________

122. All human beings can hear sounds of frequencies upto 60,000 Hz.

Answer

123. The sound in a sitar is produced by plucking its strings.

124. Sound cannot travel through vacuum.

125. Sound does not need a medium for its propagation.

126.. The loudness is expressed in a unit called decibel

127. Loud sounds have high frequencies.

128.. Sound travel faster in air, slower in iron.

129. Light travels much faster than sound.

130.. Man cannot hear sound of bats.

131. The time taken to complete one oscillation is called frequency

132. Shriller sound has more frequency.

133. Tabla is a musical instrument.

134. The sound could not travel in solid.

135. The pitch of a sound depends in the frequency of the waves.

.136 A sound wave travels from east to west, in which direction do the particles of air move?

(A) East – west                           (B) North - south

(C) Up and down                         (D) None of these

137.. In which medium sound travels faster ?

(A) Solid                                   (B) Liquid

(C) Gas                                      (D) None of these

138. What is the name of short duration wave?

(A) Pulse                                    (B) Frequency

(C) Time period                           (D) Velocity

139.. What is the velocity of sound in water at room temperature?

(A) 1500 m/s                              (B) 340 m/s

(C) 1500 km/s                             (D) 330 km/s

140.. The unit of quantity on which pitch of the sound depends is :

(A) Hertz                                    (B) metre

(C) metre/second                        (D) second


141.. The unit of quantity on which loudness of found depends is :

(A) metre                                   (B) Hertz

(C) metre/second                        (D) Decibel


142. Nature of sound wave is :

(A) transverse                             (B) longitudinal

(C) electromagnetic                    (D) seismic


143. Pitch of high frequency sound is :

(A) high                                     (B) low

(C) zero                                     (D) infinite


144. Voice of a friend is recognized by its :

(A) Pitch                                     (B) quality

(C) Intensity                               (D) velocity


145. S I unit of Intensity of Sound waves is :

(A) watt/m^2                                  (B) j/s

(C) w/m                                          (D) kwh

146. Pitch is the sensation  of the ---------- of an emitted sound.


147. A high pitch sound is called a ------ sound


148. A low pitch sound is called a -----------  sound.


149. Loudness of sound wave is ditectly proportional to -------- amplitude


150. The sound energy transferred per unit area per unit time is called -------- of sound.


151. When a body moves with a speed which is greater than the speed of sound in air, it is said to be traveling at --------------

152. When wound waves traveling in air enter into the medium of water, ------- remains unchanged

153. Sound travels faster as the  ------------ of the medium increases by 0.61 m/s with every 1 deg C

  154. -----is an apparatus which is used to find the depth of a sea or to locate the under water things.

155. A sound wave of single frequency is called

155. An ________ is a reflected sound.

Vibration

Echo

Pitch

Volume

156. __________ means to move back and forth quickly.

A.Pitch

B.Amplitude

C.Vibration

D.Echo

157 ______________ is the amount of energy in a sound wave.

A..Amplitude

B.Echo

C.Volume

D.Vibration

158. Sound is a form of energy produced by ______________.

159.  Eardrum is a part of

      a.  Sound producing organ

      b.  Skeletal system

      c.  Hearing organ

      d.  Reproductive organ

160.   The hearing range of human ear is

      a.  20 Hz to 20,000 Hz

      b.  Less than20 Hz

      c.  More than 20,000 Hz

      d.  20 Hz to 25,000 Hz

161.   The voice box is called:

      a.  Stomach

      b.  Heart

      c.  Larynx

      d.  Mouth

162.   Large amplitude of sound vibrations will produce:

      a.  Loud sound

      b.  Meak sound

      c.  Slow sound

      d.  Shreak

163.   The pitch of sound depends on

      a.  frequency

      b.  amplitude

      c.  both of these

      d.  none of these

164   Sound is kind of

      a.  Work

      b.  Energy

      c.  Force

      d.  None

165  To an fro motion of an object is called

      a.  Waves

      b.  Amplitude

      c.  Vibration

      d.  All of the above

166.   Voice box or larynx of human process

      a.  Sound

      b.  Wind

      c.  Loudness

      d.  None

167   Sound propagates maximum in

      a.  Gas

      b.  Liquid

      c.  Solid

      d.  All

168.   Noise pollution is harmful for

      a.  Human

      b.  Cat

      c.  Bird

      d.  All