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JEE MAIN 2019
12-04-2019 S2
Question
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 $10^{-12} \mathrm{~W} / \mathrm{m}^2$ ]
Select the correct option:
A
30 cm
B
40 cm
C
10 cm
D
20 cm
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
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