A Pipe Of Length 20 Cm Is Open At Both Ends. Which Harmonic Mode Of The Pipe Is Resonantly Excited By A 1700 Hz Source? The Speed Of Sound = 340 Ms–1.  

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Question

A pipe of length 20 cm is open at both ends. Which harmonic mode of the pipe is resonantly excited by a 1700 Hz source? The speed of sound = 340 ms–1 

Solution

Correct option is

Second harmonic

 

In an open pipe, the condition of resonance is  

                               

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