A tuning fork of frequency 512 Hz is vibrated with a sonometer wire and 6 beats per second are heard. The beat frequency reduces if the tension in the string is slightly increased. The original frequency of vibration of the string is
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A
Beats
Frequency of timing for 512 Hz Frequency of sonometer wire either 512 + 6 or 512 – 6
As tension increase Frequency of sonometer wire increase n α 
No. of beat reduces. so that Frequency of sonometer wire is = 512 – 6 = 506 Hz
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