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  4. There are 10 sound sources each producing intensity I at a point independently. They are incoherent. Average intensity of sound at that point will be:

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Q. There are $10$ sound sources each producing intensity $I$ at a point independently. They are incoherent. Average intensity of sound at that point will be:

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Solution:

Since the sources are incoherent there will be no sustained interference.
Hence at the given point,
Average intensity $=I_{0}=I_{1}+I_{2}+I_{3}+\cdots +I_{10}=10 I$