A wave delivers a power of 12 W uniformly over an area of 0.03 m^2. Its intensity is:

  1. 400 W/m^2
  2. 40 W/m^2
  3. 800 W/m^2
  4. 4000 W/m^2
Answer

A) 400 W/m^2

I = PA = 120.03 = 400 W/m^2. SLO P-11-D-01 · Application

Physics MCQ · More Wave Intensity and the Doppler Effect MCQs · Practise