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Chapter 13 - Sound - 2
1.
If f is frequency and lambda is wavelenth then speed V lf sound can be found by formula
a) V=f
l
b) V=
l
2
/f
c) V=f/
l
d) V=
l
/f
2.
SI unit of intensity of sound is
a) W/m
2
b) Wm
2
c) Bel
d) Decibel
3.
Intensity level of loudest sound which can be heard without pain is
a) 140db
b) 0
c) 60db
d) 120db
4.
Pitch of sound depends upon
a) amplitude
b) area
c) frequency
d) distance
5.
Speed of sound is greatest in
a) steel
b) air
c) vacuum
d) waer
6.
The distance between any two consecutive compression or rarefactions is called
a) frequency
b) intensity
c) speed
d) wavelength
7.
Old people cannot hear sounds of frequency
a) 15 KHz
b) none
c) below 15 KHz
d) above 15 KHz
8.
Sound energy flowing per second through a unit area held perpendicular to the direction of sound waves is called
a) quality
b) frequency
c) intensity
d) loudness
9.
Audible frequency range is
a) 10KHz to 20KHz
b) 20Hz to 10KHz
c) 20Hz to 20 KHz
d) 20KHz to 25KHz
10.
Match the column.................................sound is a form of
a) medium
b) comprestions
c) crests
d) energy
11.
Match the column.................................sound is produced by
a) vibrations
b) compressions
c) crests
d) solids
12.
Match the column.................................sound consits of
a) energy
b) compressions
c) medium
d) crests
13.
Match the column.................................sound propagates through
a) energy
b) crests
c) vibrations
d) medium
14.
Match the column.................................sound moves faster in
a) vibrations
b) solids
c) energy
d) medium
15.
Match the column.................................loudness depends upon
a) noise
b) frequency
c) sound energy
d) area vibrating body
16.
Match the column.................................pitch depends upon
a) sound energy
b) frequency
c) noise
d) area vibrating body
17.
Match the column.................................quality depends upon
a) sound energy
b) area vibrating body
c) musical sound
d) overtones
18.
Match the column.................................intensity depends upon
a) sound energy
b) area vibrating body
c) frequency
d) noise
19.
Match the column.................................unpleasant effect
a) frequency
b) area vibrating body
c) noise
d) sound energy
20.
Match the column.................................sound of train
a) 10 db
b) 120 db
c) 100 db
d) 60 db
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