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Q.

The sequence of harmonics of a pipe open at one end and closed at the other end is 250 Hz and 350 Hz. The resonating length of the air column in its fundamental mode will be (Velocity of sound in air is 340 m/s)

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a

0.85 m

b

0.25 m

c

1.7 m

d

1.35 m

answer is C.

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Detailed Solution

2f=350-250=100Hz

λ=Vf=34050=6.8m

The resonating length of the air column in its fundamental mode

=λ4=6.84=1.7

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