1.

A tuning fork A of frequency 510 Hz produces 4 beats per second when sounded with another tuning fork B of unknown frequency. If B is loaded with wax, the number of beats is again 4 per second. The frequency of the tuning fork B before it was loaded is

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A tuning fork A of frequency 510 Hz produces 4 beats per second when sounded with another tuning fork B of unknown frequency. If B is loaded with wax, the number of beats is again 4 per second. The frequency of the tuning fork B before it was loaded is



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