Question

In a sound wave, to increase the intensity by a factor of 10, pressure amplitude must be changed by a factor of:

• A. √10
• B. 10
• C. 10√2
• D. √20

Answer 1

Answer: (A)

√10

Answer 2

I α₀²

$\frac{I'}{I} = \frac{P_{0}^{'2}}{P_{0}^{2}}$

P₀' = P $\sqrt{\frac{I'}{I}}$

P₀ ' = $\sqrt{10}$ p