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Beat Frequency

A thin fork a...

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A thin fork and an air column whose temperature is 51^0C produce 4 beats per second, when sounded together. When the temperature of air column decreases the no. Of beats per second decreases. When the temperature remains 16^0C only one beat per second is produced. The frequency of the tuning fork is A)100Hz B)75Hz C)150Hz D)50Hz

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