CBSE Questions for Class 8 Physics Sound Quiz 8 - MCQExams.com

How do plants help for reducing noise pollution?
  • By osmosis
  • By reflecting sound
  • By absorbing sound
  • By passing it through water
Which sound property determine 'Loudness'?
  • Amplitude
  • Frequency
  • Wavelength
  • Speed
Sound cannot pass through me.I am?
  • Vacuum
  • Glass
  • Water
  • Wood
Match the following and choose the correct option
AString vibration1.Tabla
BMembrane vibration2.Cymbals
CVibration of air3.Sitar
DVibration of plate4.Flute
  • A-I, B-2, C-3, D-4
  • A-2, B-1, C-4, D-3
  • A-3, B-1, C-4, D-2
  • A-4, B-3, C-2, D-1
Birds produce sound by using:
  • vocal chord
  • larynx
  • glottis
  • syrinx
The voices of men, women and children are different due to difference in:
  • Larynx
  • Lungs
  • Vocal coards
  • Wind pipe
When we say 'sound travels in a medium' we mean :
  • the particles of the medium travel
  • the source travels
  • the disturbance travels
  • none of the above
State whether true or false :
Higher the frequency of sound, higher would be its pitch.
  • True
  • False
The buzzing sound produced by a mosquito is produced by:
  • its mouth
  • vibration of sorrunding air
  • vibration of wings
  • none of these
Vibration of air column produces sound in which of the following instruments?
  • jaltaranga
  • flute
  • siren
  • all of the above
The nerve that carries the signals from the ear to the brains is called:
  • Auditory nerve
  • Optic nerve
  • Motor nerve
  • Spinal cord
In Dholak sound produce due to which of the following?
  • Stretched membrane  
  • Stretched strings
  • Vibration of  air
  • Air column 
The membrane of a drum vibrates to produce sound. Similarly, the string of a sitar vibrates to produce sound. Based on these two examples answer the following question. Which part of a whistle vibrates to produce sound?
  • body of whistle
  • air
  • mouth of the person
  • all of the above
The figure given shows the images of sound waves. Look at them and answer the following question. 
Which sound is noise?

284020_a1fc1e21a5424ed0997e632989f4a48c.png
  • $$d$$
  • $$c$$
  • $$b$$
  • $$a$$
The loudness of sound is normally between -
  • 10 dB - 25 dB
  • 50 dB - 60 dB
  • 90 dB - 105 dB
  • 120 dB - 130 dB
Choose the correct answer.
Sound can travel through
  • Gases only
  • Solids only
  • Liquids only
  • Solids, liquids and gases
In the following sentence. say 'True' and 'False'
$$(a)$$ Sound can't travel in vacuum (T/F)
$$(b)$$ The number of oscillations per second of a vibrating object is called its time period. (T/F)
$$(c)$$ If the amplitude of vibration is large, sound is feeble. (T/F)
$$(d)$$ For human ears, the audible range is 20Hz to 20,000Hz. (T/F)
$$(e)$$ The lower the frequency of vibration, the higher is the pitch.
$$(f)$$ Unwanted or unpleasant sound is termed as music. (T/F)
$$(g)$$ Noise pollution may cause partial hearing impairment. (T/F)
  • $$TFTTFFT$$
  • $$TTFTFFT$$
  • $$TFFTFFF$$
  • $$TFFTFFT$$
The sound from a mosquito is produced when it vibrates its wings at an average rate of $$500$$ vibrations per second. What is the time period of the vibration?
  • 0.001
  • 0.002
  • 0.003
  • 0.004
Rahul is playing the drums. Then which of the following characteristics of sound would result in increase in loudness?
  • Amplitude
  • Speed
  • Pitch
  • Quality
What do you think a tabla player does to increase the pitch of the sound produced?
  • He strikes the table skin harder.
  • The pitch cannot be changed in a table.
  • He tightens the skin by stretching the string around it.
  • He gets a bigger tabla.
The piston in a petrol engine goes up and down $$3000$$ times per minute. For this engine, calculate the period of the piston.
  • $$0.02\ s$$
  • $$0.04\ s$$
  • $$0.05\ s$$
  • $$0.08\ s$$
Which of the following statements is correct?
  • The time taken for one oscillation is the frequency.
  • The distance covered by an oscillating body while making one complete oscillation is four times the amplitude.
  • The greater the amplitude of an oscillating body, the higher will be the pitch of the sound it gives out.
  • In a string instrument, thin strings are used for low pitch notes.
A bicycle wheel spins 25 times in 5 seconds. Calculate frequency of the wheel.
  • 15 Hz
  • 10 Hz
  • 40 Hz
  • 5 Hz
Calculate the period of a strobe light flashing $$25$$ times in $$5.0\ s$$.
  • $$5\ s$$
  • $$0.2\ s$$
  • $$3\ s$$
  • $$0.6\ s$$
The maximum distance that a particle moves away from its rest position is called ________________.
  • Amplitude
  • Frequency
  • Velocity
  • Time period
State whether the given statement is True or False :
The part of the ear that is damaged most easily by continued exposure to loud noise is the stirrup.
  • True
  • False
Science fiction films often show battles between spaceships. Four friends were arguing what would someone in space hear if an enemy spaceship exploded?
Rekha said, 'they would hear a big explosion.'
Renu saud,'they will not hear anything as there is no medium for sound to travel, but they can see the explosion.'
Ramesh said, 'yes, they will not hear anything and they will not be able to see the explosion.'
Raghav said,'the explosion produces sound of frequency above 20,000 Hz hence we cannot hear it.' 
Who is correct?
  • Rekha
  • Renu
  • Ramesh
  • Raghav
When tuning a violin, a string is tightened. The musical note being played on the string becomes higher in pitch.
  • True
  • False
  • Ambiguous
  • Data insufficient
Convert the frequency $$1.492 \ Hz$$ to time period.
  • $$0.67 \ s$$
  • $$1.52 \ s$$
  • $$0.43 \ s$$
  • $$5 \ s$$
Each of the four bowls below is filled with water up to different levels. When struck with a wooden rod, which bowl will produce sound of the lowest pitch?
305864_7602aa4a166c4fcd862bca31bd59103a.png
  • a
  • b
  • c
  • d
0:0:1


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