Answer
(c) 1000
Work Step by Step
$L=10log\frac{I}{I_{0}}$
Also, $L=30dB$
Therefore, $log\frac{I}{I_{0}}=3$
or, $I=I_{0}\times 1000$
College Physics (7th Edition)
by Wilson, Jerry D.; Buffa, Anthony J.; Lou, Bo
Published by
Pearson
ISBN 10:
0-32160-183-1
ISBN 13:
978-0-32160-183-4
Chapter 14 - Sound - Learning Path Questions and Exercises - Multiple Choice Questions - Page 522: 10
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