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Intensity of a point source at different distances

This type of question, asked 2 times: 30 Jan 2024, 24 Jan 2026 S2. All 2 questions below, oldest first.

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  1. Question 1

    30 Jan 2024

    119
    A point source is emitting sound waves of intensity 16×10−8Wm−216 \times10^{- 8}Wm^{- 2} at the origin. The difference in intensity (magnitude only) at two points located at a distances of 2 m2\text{ }m and 4 m4\text{ }m from the origin respectively will be _____ ×10−8Wm−2\times10^{- 8}Wm^{- 2}

  2. Question 2

    24 Jan 2026 S2

    16
    A point source is kept at the center of a spherically enclosed detector. If the volume of the detector increased by 8 times, the intensity will

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