The intensity of sound from a speaker is 8 × 1 0 − 3 μ W/m 2 at 3 m. What is it at 12 m, in μ W/m 2 ?

I ∝ 1/ r 2 , so I = 8 × 1 0 − 3 × 16 1 = 5 × 1 0 − 4 .

Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveWavesEasy2 minQB

PhysicsEasysingle choice

The intensity of sound from a speaker is $8 \times 1 0^{- 3} μ W/m^{2}$ at 3 m. What is it at 12 m, in $μ W/m^{2}$ ?

Answer:

Solution:

$I \propto 1/ r^{2}$ , so $I = 8 \times 1 0^{- 3} \times \frac{1}{16} = 5 \times 1 0^{- 4}$ .

Stream:JEESubject:PhysicsTopic:Sound WaveSubtopic:Waves

⏱ 2mℹ️ Source: QB

Loading discussions...