The intensity of sound from a radio at a distance of 2 metres from its speaker is 1 × 1 0 − 2 μ W/m 2 . The intensity at a distance of 10 meters would be:

I ∝ 1/ r 2 . I = 1 0 − 2 × 25 1 = 4 × 1 0 − 4 μ W/m 2 .

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The intensity of sound from a radio at a distance of 2 metres from its speaker is $1 \times 1 0^{- 2} μ W/m^{2}$ . The intensity at a distance of 10 meters would be:

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Answer:

Solution:

$I \propto 1/ r^{2}$ . $I = 1 0^{- 2} \times \frac{1}{25} = 4 \times 1 0^{- 4} μ W/m^{2} .$

Stream:JEESubject:PhysicsTopic:Sound WaveSubtopic:Waves

⏱ 2mℹ️ Source: QB

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