Class 8 Science MCQ Sound

Question : 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 : 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<

Question :Noise pollution is harmful for
(a) All
(b) Human
(c) Cat
(d) Bird<

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

Question : 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 : 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 :Sound propagates maximum in
(a) Solid
(b) Gas
(c) Liquid
(d) All<

Question :Voice box or larynx of human process
(a) Sound
(b) Wind
(c) Loudness
(d) None of the options<

Question :To an fro motion of an object is called
(a) Vibration
(b) Waves
(c) Amplitude
(d) All of these<

Question :Sound is kind of
(a) Energy
(b) Work
(c) Force
(d) None of the options<

Question :The pitch of sound depends on
(a) Frequency
(b) Amplitude
(c) Frequency and amplitude
(d) None of the options<

Question :Eardrum is a part of
(a) Hearing organ
(b) Sound producing organ
(c) Skeletal system
(d) Reproductive organ<

Question : An Object Is Vibrating At 50 Hz. What Is Its Time Period?
(a) 0.02 s
(b) 2 s
(c) 0.2 s
(d) 20 s

Question : Consider The Following Statements And Choose The Correct One:
(a) The pitch of a sound depends on the frequency of vibration.
(b) If the frequency of vibration is low, the sound produced has a low pitch.
(c) If the frequency of vibration is high, the sound produced has a high pitch.
(d) All the above.

Question : The pitch of sound depends on
(a) frequency
(b) amplitude
(c)both of these
(d) none of these

Question :Large amplitude of sound vibrations will produce:
(a) Loud sound
(b) Meak sound
(c) Slow sound
(d) Sheark<

Question :The voice box is called:
(a) Larynx
(b) Stomach
(c) Heart
(d) Mouth<

Question :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 : When the amplitude is small, the sound produced is:
(a) loud
(b) feeble
(c) low pitched
(d) none of these

Question : Large amplitude of sound vibrations will produce:
(a) loud sound
(b) slow sound
(c) meak sound
(d) shreak

Question : Sound waves do not travel through
(a) solids
(b) gases
(c) liquids
(d) vacuum

Question : In sitar sound Is produced by:
(a) beating
(b) rubbing
(c) blowing
(d) plucking

Question : A shehnai produces sound from:
(a) vibrating strings
(b) vibrating membrane
(c) vibrating air column
(d) none of these

Question : Sound:
(a) can travel through vacuum
(b) cannot travel through vacuum
(c) sound can sometimes travel through
(d) none of these vacuum

Question : The Loudness Of Sound Is Determined By Its:
(a) Amplitude of vibration
(b) Ratio of amplitude and frequency of vibration
(c) Frequency of vibration
(d) Product of amplitude and frequency of vibration

Question :Unwanted or unpleasant sound is termed as music.

Question :Noise pollution may cause partial hearing impairment.

Question :Sound cannot travel in vacuum.

Question :The number of oscillations per sound of a vibrating object is called its time period.

Question :If the amplitude of vibration is large, sound is feeble.

Question :For human ears, the audible range is 20 Hz to 20,000 Hz.

Question :The lower the frequency of vibration, the higher is the pitch.

Question :The loudness of sound is measured in hertz.

Question :One hertz means one vibration per second.

Question :Cusions, curtains and rugs absorb sound.

Question :The quality of sound depends on the material of vibrating part.

Question :Sound travels fastest in solids.

Question :We can hear all the vibrations made by different bodies.

Question :Sound with frequency above 20,000 Hz is called ultrasonic.

Question :Smaller the amplitude of vibration, the louder is the sound.

Question :In human beings, the vibration of the vocal cords produces sound.

Question :Unwanted sound is called ___________________..

Question :Shrillness of a sound is determined by the ___________________. of vibration.

Question :Time taken by an object to complete one oscillation is called ___________________.

Question :Loudness is determined by the ___________________. of vibration.

Question :The unit of frequency is ___________________..

Question :Sound is produced by ___________________. objects.

Question :___________________. in human beings vibrate to produce sound.

Question :Sound requires a ___________________. to travel.

Question :The number of vibrations per second defines ___________________..

Question :Sound travels fastest in ___________________..

Question :When we touch a source of sound, we can feel the ___________________..

Question :Sound cannot travel in ___________________..

Question :The audible frequency for human ear is ___________________..

Question :Only vibrating bodies produce ___________________..

Question :___________________. part of dholak vibrate to produce sound.

Question :___________________. part of Sitar vibrate to produce sound.

Question :___________________. part of flute vibrate to produce sound.