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Physics 10 Chapter 11 - Sound - 15
1.
What is the intensity of faintest audible sound?
a) 10
3
Wm
-2
b) 10
-1
Wm
-2
c) 10
5
Wm
-2
d) 10
4
Wm
-2
2.
What is the intensity level of faintest audible sound in dB?
a) 150 dB
b) 190 dB
c) 0 dB
d) 170 dB
3.
What is the intensity of threshold?
a) 10
8
Wm
-2
b) 10
11
Wm
-2
c) 10
-12
Wm
-2
d) 10
9
Wm
-2
4.
What is the intensity level of a threshold in dB?
a) 190 dB
b) 150 dB
c) 170 dB
d) 0 dB
5.
Calculate the intensity level of the faintest audible sound?
a) 170 dB
b) 190 dB
c) 0 dB
d) 150 dB
6.
Calculate the intensity level of the rustling of leaves?
a) 170 dB
b) 10 dB
c) 190 dB
d) 150 dB
7.
When sound is incident on the surface of a medium it bounces back into the same medium. What is this phenomena called?
a) Meth
b) Macho
c) Echo
d) Ethos
8.
When sound is incident on the surface of a medium it bounces back into the same medium. What is this phenomena called?
a) Reflection of sound
b) Refraction of sound
c) Deviation of sound
d) Diffraction of sound
9.
When sound is incident on the surface of a medium it bounces back into the same medium. What is this phenomena called?
a) Refraction of sound
b) Both b and c
c) Echo
d) Reflection of sound
10.
What is the sound called that we hear again when we clap near a reflecting surface?
a) Macho
b) Meth
c) Echo
d) Ethos
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