Environment Studies (Science) (M.Phil./Ph.D.) 2018 Panjab University Entrance Exam With Answers

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2.

Noise level of 50 dB corresponds to sound intensity of

A: 10^−5 Wm^−2
B: 10^−7 Wm^−2
C: 10^−3 Wm^−2
D: 10^−9 Wm^−2

The answer is: B

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