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

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Correct option is A

dB=10log10⁡II0 where I0=10−12Wm−2 70=10log10⁡II0 or II0=107 or I=107×I0=107×10−12=10−5Wm−2

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

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