wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A point source of power 50π W is producing sound waves of frequency 1876 Hz. What is the pressure amplitude at a distance 330 m from the point source?
[Speed of sound is 330 m/s and density of air is 1 kg/m3]

A
5 N/m2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
6 N/m2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
7 N/m2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
8 N/m2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 5 N/m2
Intensity at distance r,
I=P4πr2 .......(1)
Also,
I=ΔPo22ρv ..........(2)
From (1) and (2),
ΔPo22ρv=P4πr2
ΔPo=Pρv2πr2
ΔPo=50 π×1×3302π×330
ΔPo=5 N/m2

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Intensity of Sound
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon