A small speaker delivers 2 W of audio output. At what distance from the speaker will one detect 120 dB intensity … ) 10 cm (3) 40 cm…
Answers:
Correct option (3) 40 cm
Explanation:
L = 10 log I/I0
120 = 10 log I/I0
12 = log10.1/10-12
I/10-12 = 1012
I = I = P/4πr2
r2 = 2/(4π × I)