Two Pipes Closed at One End of Length L₁ and L₂

question 64

Multiple Choice

Two pipes closed at one end of length L₁ and L₂ are excited at their resonant frequencies.If the beat period is B_f Hz,then the velocity of sound is given by:

• A)B_f \(\times\) L₁ \(\times\) L₂ / (4L₁ \(\times\) 4L₂)
• B)4 \(\times\) B_f \(\times\) L₁ \(\times\) L₂ / (4L₁ - 4L₂)
• C)16 \(\times\) B_f \(\times\) L₁ \(\times\) L₂ / (4L₁ + 4L₂)
• D)4 \(\times\) B_f \(\times\) L₁ \(\times\) L₂ / (L₁ -L₂)
• E)4 \(\times\) B_f \(\times\) L₁ \(\times\) L₂ / (L₁ + L₂)

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