Assertion : Sound level increases linearly with intensity of sound.
Reason : If intensity of sound is doubled, sound level increases approximately `3 dB` .

Options

A. If both Asseration and Reason are true an dthe Reason is correct explanation of the Asseration.
B. If both Asseration and Reason are true but Reason is not the correct explanation of Asseration.
C. If Asseration is true , but the Reason is false.
D. If Asseration is false but the Reason is true.

Answer

D

Explanation

`L = 10 log_(10)(I)/(I_(o))`
Increase in the value of `L` is not linear with`I` .
`Delta L = L_(2) - L_(1) = log .(I_(2)) / (I_(1))`
`Delta L = 3 dB` if `I_(2) = 2I_(1)`