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Sound
mcqs by everyone
Loudness of sound varies directly with vibrating body's
Pitch
Amplitude
Quality
intensity
Sound and light waves both
have similar wavelength
travel through vacuum
travel as longitudinal waves
obey the laws of reflection
Speed of sound can be found by relation
v = fλ
v = cλ
v = ma
f=1⁄T
A safe level of noise depends on
Pitch
level of noise and exposure to noise
Frequency
area
Sound waves can be transmitted by any
None of the above
vacuum
both medium and vacuum
Medium
Technique or method to absorb undesirable sounds by soft and porous surface is called
acoustic protection
audible protection
unacoustic protection
decibel protection
Wavelength of ultrasonic waves is
very small
Negative
very large
Zero
Sound energy passing per second through a unit area held perpendicular to direction of propagation of sound waves is called
intensity of sound
loudness of sound
quality of sound
pitch of sound
Unit of wavelength is __________
dyne
newton
Angstrom
erg
When a wave travels through a medium ______
none of the above statements is applicable
energy is transferred at a constant speed
energy is transferred in a periodic manner
particles are transferred from one place to another
Frequency range for ultrasound is
25,000 Hz
less than 20,000 Hz
less than 20Hz
20,000 Hz above
As compare to air, speed of sound in liquids and solids is
faster
Equal
Lower
Zero
Which of the following quantities is transferred during wave propagation
Speed
Matter
mass
Energy
SI Unit of time period is __________
minute
nanosecond
Second
hour
Frequency of tuning fork depends on
stiffness of its prongs
area of its prongs
density of its prongs
mass of its prongs
Voice box or larynx of human process
Sound
Loudness
None
Wind
Speed of sound in liquid is
2 times that in gas
5 times that in gas
8 times that in gas
3 times that in gas
Area and loudness are
not related at all
inversly proportional
inversely related
directly related
Which of the following will remain unchanged when a sound wave travels in air or in water
Frequency
Wavelength
Speed
Amplitude
Bats can hear frequencies up to
120,000 Hz
30,000 Hz
15,000 Hz
180,000 Hz
Which part of human ear converts sound vibrations into electrical signals
Cochlea
Tympanic membrane
Stirrup
Hammer
Sound produced by a large drum is louder than a small drum because of its
large vibrating area
distance from sticks
None of the above
small vibrating area
A human hear can not hear a sound of frequency less than
10 Hz
40 Hz
20 Hz
30 Hz
Sound waves are mechanical in nature because
They require medium for propagation
They don't require medium for propagation
They are longitudinal
They are transverse
A sound source sends waves of 400 Hz. It produces waves of wavelength 2.5 m. The velocity of sound waves is
100 m/s
3000 km/s
10000 m/s
1000 m/s
To find speed of sound, we use relation
v = fλ
f = vλ
lambda = fv
v = f + lambda;
Sounds of frequency higher than 20,000 Hz which are inaudible to normal human ear are called
Noise
Amplitude
ultrasonics
Frequency
A normal human ear can hear a sound only if its frequency lies between
50 Hz to 50,000 Hz
20 Hz to 20,000 Hz
30 Hz to 30,000 Hz
10 Hz to 10,000 Hz
Speed of sound depends upon
Temperature and pressure of medium
Pressure of the medium
Temperature of the medium
Temperature of source producing sound
An example for mechanical wave
Light wave
Sound wave
Infrared radiation
Radio wave
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