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Byju's Answer
Standard VIII
Physics
Decibels
How many time...
Question
How many times more intense is
90
dB
sound than
40
dB
sound?
A
5
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B
50
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C
500
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D
10
5
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Solution
The correct option is
D
10
5
Loudness of the sound is diven by
β
2
−
β
1
=
10
l
o
g
10
I
2
I
1
⇒
50
=
10
l
o
g
10
I
2
I
1
⇒
I
2
I
1
=
10
5
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