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Physics 10 Chapter 11 - Sound - 16
1.
For how many seconds the sensation of sound persists in our brain?
a) 3.4 s
b) 34 s
c) 17 s
d) 0.1 s
2.
In echo, sound is....................?
a) Deviated
b) Diffracted
c) Refracted
d) Reflected
3.
To hear a clear echo, what should be the time interval between our sound and the reflected sound?
a) 34 s
b) 0.1 s
c) 17 s
d) 3.4 s
4.
What is the speed of sound in air at normal temperature?
a) 386 ms
-1
b) 340 ms
-1
c) 331 ms
-1
d) 640 ms
-1
5.
If we consider the speed of sound in air at normal temperature to be 340 ms
-1
, then after how many seconds we will hear the clear echo?
a) 34 s
b) 0.1 s
c) 17 s
d) 3.4 s
6.
Due to which of the following process, echoes may be heard more than once?
a) Both b and c
b) Due to successive reflections
c) Due to resonance
d) Due to multiple reflections
7.
What is the loudest animal sound ever recorded?
a) 120 dB
b) 180 dB
c) 100 dB
d) 140 dB
8.
By which of the following the loudest rumble sound was produced?
a) Blue whale
b) White shark
c) Dolphin
d) Indus dolphin
9.
By which of the following the loudest 180dB rumble sound was produced?
a) Blue whale
b) Dolphin
c) Indus dolphin
d) White shark
10.
To hear a clear echo, how much should be the distance of obstacle from the source of sound?
a) 34 m
b) 37 m
c) 17 m
d) 14 m
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