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Physics 10 Chapter 11 - Sound - 13
1.
How many dB is equal to 1 bel?
a) 100
b) 2
c) 20
d) 10
2.
If intensity level is measured in dB, then what will be the formula of intensity level?
a) Sound level = Antilog (I + Io) (dB)
b) Sound level = 10 log (I / Io) (dB)
c) Sound level = Antilog (I - Io) (dB)
d) Sound level = Log (I - Io) / 10 (dB)
3.
What is the scale called that is used for measuring intensity of sound?
a) Bel scale
b) Alex scale
c) Intensity scale
d) Decibel scale
4.
What is measured by decibel scale?
a) Intensity level of sound
b) Pitch of sound
c) Loudness of sound
d) Quality of sound
5.
What is the intensity of a nearby jet airplane?
a) 10
5
Wm
-2
b) 10
6
Wm
-2
c) 10
4
Wm
-2
d) 10
3
Wm
-2
6.
What is the intensity level of a nearby jet airplane in dB?
a) 100 dB
b) 120 dB
c) 150 dB
d) 130 dB
7.
What is the intensity of a fast jackhammer?
a) 10
4
Wm
-2
b) 10
5
Wm
-2
c) 10
6
Wm
-2
d) 10
1
Wm
-2
8.
What is the intensity level of a fast jackhammer in dB?
a) 190 dB
b) 170 dB
c) 150 dB
d) 130 dB
9.
What is the intensity of a train siren?
a) 10
5
Wm
-2
b) 10
4
Wm
-2
c) 10
0
Wm
-2
d) 10
6
Wm
-2
10.
What is the intensity level of a train siren in dB?
a) 120 dB
b) 170 dB
c) 150 dB
d) 190 dB
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