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Sound — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceSound1 Mark
MCQ
Loudness of sound increases with:
  • A
    The amplitude of vibrating body.
  • ✓
    The increase in surface area of vibrating body.
  • C
    The decrease in frequency of vibrating body.
  • D
    The increase in distance from the source of sound.
✓

Answer

Correct option: B.
The increase in surface area of vibrating body.
Loudness increases with an increase in the amplitude of the wave or increase in the surface area of the source or increase in intensity. it is independent of frequency.

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