When interference is produced by two progressive \( \mathrm{P} \) w...

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When interference is produced by two progressive
\( \mathrm{P} \) waves of equal frequencies, then the maximum

W intensity of the resulting sound are \( \mathrm{N} \) times the intensity of each of the component waves. The value of \( \mathrm{N} \) is
(1) 1
(2) 2
(3) 4
(4) 8
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