The SI unit for intensity of sound is:
Correct answer: B. Watt per metre square
- A. Joule per second
- B. Watt per metre square
- C. Watt metre square
- D. Joule per metre square
- E. Joule metre
Explanation
Intensity is the amount of sound power passing through a unit area, and is measured in watts per square meter (W/m²). The correct answer is Option B: Watt per metre square. Other options do not represent intensity: Option A, Joule per second, measures power; Option C, Watt metre square, is not a recognized unit; Option D, Joule per metre square, measures energy density; and Option E, Joule metre, is not a standard physical unit.
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