Question:
Two tuning forks A and B sounded together give 6 beats per second. When at resonance tube closed at one end, the two forks give resonance when the air columns are 24 cm and 25 cm respectively. Calculate the frequencies of forks.
Two tuning forks A and B sounded together give 6 beats per second. When at resonance tube closed at one end, the two forks give resonance when the air columns are 24 cm and 25 cm respectively. Calculate the frequencies of forks.
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Beat frequency equals the difference of the two frequencies.
Updated On: Mar 17, 2026
- 120 Hz, 124 Hz
- 110 Hz, 114 Hz
- 150 Hz, 144 Hz
- 170 Hz, 118 Hz
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The Correct Option is A
Solution and Explanation
Step 1: For a closed organ pipe, f (1)/(L)
Step 2: Ratio of frequencies, (f₁)/(f₂)=(L₂)/(L₁)=(25)/(24)
Step 3: Given beat frequency, |f₁-f₂|=6
Step 4: Solving gives, f₁=120 Hz, f₂=124 Hz
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