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Two tuning forks A and B when sounded to...

Two tuning forks A and B when sounded together produce `2` beats per second. A has a frequncy of `340`. It is now loaded and again sounded with B. It is found that the number of beats is `4` per second. Can you say decidedly what is the frequency of B from this observation?

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The correct Answer is:
no; the unknown frequency may be `342` or `338`
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NN GHOSH-WAVE MOTION-EXERCISES
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