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Question

Two stretched wires of same length, diameter and same material are in unison. The tension in one is increased by 2% and 2 beats per second are heard. What was the frequency of the note produced when they were in unision

  1. 100 Hz    
  2. 200 Hz    
  3. 300 Hz    
  4. 400 Hz    

The correct answer is: 200 Hz

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