A source of sound emits 200 π W power which is uniformly distributed over a sphere of…
Physics · JEE Main · NTA Exams — Oscillations and Waves
A source of sound emits 200 π W power which is uniformly distributed over a sphere of radius 10 m. What is the loudness of sound on the surface of the sphere (log 2 = 0.3)?
- 70 dB
- 74 dB
- 80 dB
- 117 dB
Answer
(D) 117 dB
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