A point like sound source emits sound in all direction uniformly. An observer who is at a distance of 50 m from the source detects sound of intensity $10^{- 2} w a t t / m^{2} .$ If the bulk modulus of air is $1.6 \times 10^{5} N / m^{2}$ and velocity of sound is 340 m/s. Find pressure amplitude $(i n N / m ²)$ at the position of observer in nearest integer.

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

answer is 3.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

$I = \frac{P_{0}^{2} V}{2 B}$

$10^{- 2} = \frac{P_{0}^{2} \times 340}{2 \times 1.6 \times 10^{5}}$

$P_{0} = \sqrt{\frac{320}{34}} = \sqrt{\frac{160}{17}}$

$P_{0} = 3$

Watch 3-min video & get full concept clarity

JEE

NEET

Foundation JEE

Foundation NEET

CBSE