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Sound — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceSound1 Mark
MCQ
When we change sound to loud sound we increase its:
  • A
    Frequency
  • B
    Amplitude
  • C
    Velocity
  • D
    Wavelength
✓

Answer

  1. Amplitude

Explanation:

Loudness depends on the square of the amplitude of the wave. 
That is, loudness∝(amplitude)2.

Amplitude is the size of the vibration, and this determines how loud the sound is.  Larger vibrations make larger amplitude, hence, louder the sound.

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