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14. waves and sound — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics14. waves and sound1 Mark
MCQ
The intensity of a progressing plane wave in loss-free medium is
  • A
    Directly proportional to the square of amplitude of the wave
  • B
    Directly proportional to the velocity of the wave
  • C
    Directly proportional to the square of frequency of the wave
  • ✓
    All of the above.
✓

Answer

Correct option: D.
All of the above.
d
(d) $I = 2\pi {n^2}{a^2}\rho v$ ==> $I \propto {n^2}{a^2}v$

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