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Two forks A and B when sounded together ...

Two forks A and B when sounded together produce
four beats `s^(-1)`. The fork A is in unison with 30 cm
length of a sonometer wire and B is in unison with 25
cm length of the same wire at the same tension. The
frequencies of the forks are

A

24 Hz, 28 Hz

B

20 Hz, 24 Hz

C

16 Hz, 20 Hz

D

26 Hz, 30 Hz

Text Solution

Verified by Experts

The correct Answer is:
b
`n_(1)/n_(2)=l_(2)/l_(1)=25/30=5/6 and n_(2)-n_(1)=4`
On solving, We get `n_(2)`=24` Hz and `n_(1)= 20` Hz
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-STATIONARY WAVES -EXERCISE 1
  1. the frequency of a sonometer wire is 10 Hz. When the weight producing ...

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  2. When the length of the vibrating segment of a sonometer wire is incre...

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  3. Two forks A and B when sounded together produce four beats s^(-1). The...

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  4. A pipe of 60 cm long and open at both the ends produces harmonics. Whi...

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  5. If we study the vibration of a pipe open at both ends, then the follow...

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  6. Two organ pipes, each closed at one end, give 5 beats s^(-1) when emit...

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  7. The frequency of the first overtons of a closed pipe of length l(1) is...

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  8. Air is blown at the mouth of an open tube of length 25 cm and diamete...

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  9. A pipe opened at both ends prpduces a note of frequency f(1). When the...

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  10. A closed organ pipe of length 1.2 m vibrates in its first overtone mod...

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  11. An organ pipe P closed at one end vibrates in its first narmonic. Anot...

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  12. Two closed organ pipe A and B have the same length. A is wider than B....

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  13. If lambda(1), lambda(2), lambda(3) are the wavelengths of the waves gi...

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  14. An organ pipe is closed at one end has fundamental frequency of 1500 H...

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  15. Two closed organ pipes of length 100 cm and 101 cm 16 beats is 20 sec....

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  16. An open pipe is suddenly closed at one end with the result that the fr...

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  17. An open organ pipe has fundamental frequency 100 Hz. What frequency wi...

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  18. A pipe closed at one end open at the other end, resonates with sound w...

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  19. A glass tube is open at both the ends. A tuning fork of frequency f re...

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  20. A cylinderical tube open at both ends, has a fundamental frequency f i...

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