wave_mechanics musical_sound Question 2
Question: A spherical source of power 4 W and frequency 800 Hz is emitting sound waves. The intensity of waves at a distance 200 m is
[CPMT 1999; JIPMER 2000]
Options:
A) $ 8\times {{10}^{-6}}W/m^{2} $
B) $ 2\times {{10}^{-4}}W/m^{2} $
C) $ 1\times {{10}^{-4}}W/m^{2} $
D) $ 4W/m^{2} $
Show Answer
Answer:
Correct Answer: A
Solution:
Intensity = $ \frac{\text{Power}}{\text{Area}}=\frac{4}{4\pi \times {{(200)}^{2}}}=7.9\times {{10}^{-6}} $
$ W/m^{2} $
BETA
