First slide

Intensity of

Question

The intensity in Wm^-2 of a 70 d B noise is

Moderate

A

10^-5
B

10^-7
C

10⁵
D

10⁷

Solution

$dB = 10 \log_{10} (\frac{I}{I_{0}}) where I_{0} = 10^{- 12} {Wm}^{- 2} 70 = 10 \log_{10} (\frac{I}{I_{0}}) or \frac{I}{I_{0}} = 10^{7} or I = 10^{7} \times I_{0} = 10^{7} \times 10^{- 12} = 10^{- 5} {Wm}^{- 2}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App