What is the SI unit of amplitude?

The Correct Answer is Option 2 i.e Metre.

Concept:

• Sound is a longitudinal mechanical wave that propagates by making compressions (high pressure) and rarefactions(low pressure) in its propagating medium. 

• The amplitude of wavelength is the maximum distance the particle oscillating moves from the mean position.
• The frequency of the wave is the number of times one complete cycle of compressions 

• More the frequency more is the pitch of the sound, the sound is having more shrillness. 
• The more the amplitude the more is the loudness of the sound. 

Explanation:

• Amplitude: It is defined as a maximum displacement of the vibrating particle on either side from the equilibrium position.
  • SI unit of Amplitude is Metre