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KCET 2015 Physics Solved Paper

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Question : 14

Total: 60

When two tuning forks A and B are sounded together. 4 beats per second are heard. The frequency of the fork B is 384 Hz. When one of the prongs of the fork A is filed and sounded with B, the beat frequency increases, then the frequency of the fork A is

380 Hz
388 Hz
379 Hz
389 Hz

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