When the vibrating particles move backward, they create a region of low pressure called
depression
rarefaction
hypertension
compression
When sound travels through air, the air particles
vibrate but not in any fixed direction
do not vibrate
vibrate along the direction of wave propogation
vibrate perpendicular to wave propogation
Sound is a
mechanical as well as longitudinal wave
electro-magnetic wave
transverse wave
gravitational wave
SI unit of amplitude is
1/metre
metre
1/second
second
sound made in front of a tall building 18m away, is repeated. Name the phenomenon
Reverberation
Echo
Pitch
Refraction
The range of human ear in terms of frequecy is
2 to 20,000
20 to 200
20 to 20,000
2 to 20,000
Loud and soft sounds can have the same
pitch
wavelength
amplitude
frequency
Stethescope works on the principle of
refraction of light
rectilinear propogation of sound
multiple reflection of sound
deflection of sound
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