wave_mechanics musical_sound Question 5
Question: Intensity level of a sound of intensity I is 30 dB. The ratio $ \frac{I}{I _{0}} $ is (Where $ I _{0} $ is the threshold of hearing)
[KCET 1999; J & K CET 2005]
Options:
A) 3000
B) 1000
C) 300
D) 30
Show Answer
Answer:
Correct Answer: C
Solution:
$ L=10{\log _{10}}( \frac{I}{I _{0}} )=30\Rightarrow \frac{I}{I _{0}}=10^{3} $
BETA
