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General
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Question

S1 and S2 are two coherent sources of sound. OA = OB. AB = 2.7lambda, when lis the wave length of sound waves. Number of points of maximum intensity as one moves around the circular path of large radius centered at O shown in the figure will be

  1. 12    
  2. 9    
  3. 10    
  4. 11    

The correct answer is: 10

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