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When a person wears a hearing aid, the sound intensity level increases by 30 dB. The sound intensity increases by

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When a person wears a hearing aid, the sound intensity level increases by 30 dB. The sound intensity increases by
A. `e^2`
B. `10^3`
C. `30`
D. `10^2`
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Correct Answer - B
`L_2-L_1=30dB`
`10dBlog((I_2)/(I_0))-10dBlog((I_1)/(I_0))=30dB`
`log_(10)((I_2)/(I_1))=3implies(I_2)/(I_1)=10^3`
Hence the sound intensity increases by `10^3`.
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