Intensity level of a sound of intensity I is 30 d B- The ratio 1-I0 is Where I0 is the threshold of hearingA- 3000B- 1000C- 300D- 30

The correct option is B 1000 L = 10 log_10( I/I_0) = 30 ⇒I/I_0 = 10^3 ...

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Standard XII

Physics

Decibels

Intensity lev...

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)

3000

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1000

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300

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Solution

The correct option is B
1000

L = 10 $l o g_{10} (\frac{I}{I_{0}}) = 30 \Rightarrow \frac{I}{I_{0}} = 10^{3}$

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Intensity level of a sound of intensity I is 30 dB. The ratio II0 is (Where I0 is the threshold of hearing)

The correct option is B 1000 L = 10 log10(II0)=30⇒II0=103

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)

The correct option is B
1000

L = 10 $l o g_{10} (\frac{I}{I_{0}}) = 30 \Rightarrow \frac{I}{I_{0}} = 10^{3}$