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General
Easy
Question
Two tuning forks P and Q are vibrated together. The number of beats produced are represented by the straight line OA in the following graph. After loading Q with wax again these are vibrated together and the beats produced are represented by the line OB. If the frequency of P is 341Hz, the frequency of Q will be
- 341 Hz
- 338 Hz
- 344 Hz
- None of the above
The correct answer is: 344 Hz
or 
on waxing Q, the number of beats decreases hence 
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