Fundamentholfundamenthol
JEE Main2019Physics
Q.

A small speaker delivers 2 W of audio output. At what distance from the speaker will one detect 120 dB intensity sound?

[Given reference intensity of sound as 10–12 W/m2] 

  1. A

    30 cm 

  2. B

    40 cm 

  3. C

    10 cm 

  4. D

    20 cm 

Solution

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