10. Sound

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10. Sound

MCQ"s Test

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1. Sound can travel through:

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gases only

solids only

liquids only

solids, liquids and gases

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2. Voice of which of the following is likely to have minimum frequency:

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baby girl

baby boy

a man

a woman

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3. Vibration in a body produce:

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energy

sound

heat

none of these

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4. A shehnai produces sound from:

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vibrating strings

vibrating membrane

vibrating air column

none of these

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5. Drum produces sound from:

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vibrating membrane

vibrating stretched membrane

vibrating strings

none of these

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6. Frequency of oscillations is:

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the number of oscillations per minute

the number of oscillations per hour

the number of oscillations per second

none of these

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7. The unit of frequency is:

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hertz

hertz /sec

hertz / min

hertz / hour

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8. The frequency determines the of a sound.

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loudness

pitch

both loudness and pitch

none of these

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9. When the amplitude is small, the sound produced is:

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loud

feeble

low pitched

none of these

Clear selection

10. The ultrasound equipment works at frequencies:

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higher than 20,000 Hz

lower than 20,000 Hz

less than 20 Hz

none of these

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11. Noise pollution causes:

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lack of sleep

hypertension

anxiety

all of these

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12. Trees planted along the roads reduces the harmful effect of:

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noise pollution

air pollution

both (a) and (b)

none of these

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13. Number of vocal cords in human is:

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one

two

four

none of these

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14. Sound:

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can travel through vacuum

cannot travel through vacuum

sound can sometimes travel through

none of these vacuum

Clear selection

15. Sound:

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Sound requires a medium to travel

does not require a medium to travel

sometimes require a medium to travel

none of these

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16. Propagation of sound is fastest In:

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gases

liquids

solids

vacuum

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17. Sound does not travel in:

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vacuum

gases

solids

liquids

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18. Unwanted and unpleasant sounds are called:

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noise

noise pollution

music

air pollution

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19. Process of receiving sound vibrations and sensing them by brain is called :

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producing

speaking

sensing

hearing

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20. Voice box has stretched string like parts, which vibrate to produce sound are called:

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larynx

vocal cords

nerves

arteries

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21. Large amplitude of sound vibrations will produce:

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loud sound

slow sound

meak sound

shreak

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22. High frequency of sound vibrations will produce a:

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loud sound

shreak

meak sound

low pitched sound

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23. Excess unwanted sounds is environment can cause:

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noise

disturbance

noise pollution

air pollution

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24. The range of audible sound for human ear is:

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less than 20 Hz

more than 20,000 Hz

from 20 Hz to 20,000 Hz

none of these

Clear selection

25. The amplitude of the sound wave decides its:

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loudness

pitch

speed

none of these

Clear selection

26. If the amplitude becomes twice than the loudness of sound increases by a factor of:

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no change

none of these

Clear selection

27. In sitar sound Is produced by:

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beating

rubbing

blowing

plucking

Clear selection

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