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Figure 7.88 shows a stretched string of ...

Figure 7.88 shows a stretched string of length `L` and pipes of length `L , 2L , L//2 and L//2` in options (a) , (b), (c ) and (d) respectively . The string 's tension is adjusted until the speed of waves on the string equals the speed of sound waves in the air . The fundamental mode of oscillation is the set up on the string . In which pipe will the sound produced by the string cause resonance ?

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