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Q: The SI unit of intensity of sound is………
  • A. watt per meter square
  • B. joule per meter square
  • C. Newton per meter square
  • D. tesla per meter square
Correct Answer: Option A - The intensity of sound at any Point in a medium is equal to the sound energy passing through the unit area at the Point Per second perpendicular to that surface. The S.I. unit of intensity of sound is W/m2. Sound is a longitudinal mechanical wave not an electromagnetic wave Microphone converts sound energy into electrical energy and the loudspeaker converts electrical energy into sound energy. Hence, for the transmission of requires medium.
A. The intensity of sound at any Point in a medium is equal to the sound energy passing through the unit area at the Point Per second perpendicular to that surface. The S.I. unit of intensity of sound is W/m2. Sound is a longitudinal mechanical wave not an electromagnetic wave Microphone converts sound energy into electrical energy and the loudspeaker converts electrical energy into sound energy. Hence, for the transmission of requires medium.

Explanations:

The intensity of sound at any Point in a medium is equal to the sound energy passing through the unit area at the Point Per second perpendicular to that surface. The S.I. unit of intensity of sound is W/m2. Sound is a longitudinal mechanical wave not an electromagnetic wave Microphone converts sound energy into electrical energy and the loudspeaker converts electrical energy into sound energy. Hence, for the transmission of requires medium.