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The sound intensity is 0.008W//m^( 2) at...

The sound intensity is `0.008W//m^( 2)` at a distance of 10 m from an isotropic point source of sound. The power of the source is

A

`2.5 W`

B

`0.8 W`

C

`8 W`

D

`10 W`

Text Solution

Verified by Experts

The correct Answer is:
D
`(P)/(4pir^2)=I` for and isotropic points sound source.
`impliesP=I.4pir^2`
`=(0.008W//m^(2))(4.pi.10^2)`
`=10W`
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